You're probably looking at least 10 years but not longer than 20. 5G already delivers technically on both high bandwidth and low latency but there are still plenty of places with no cell reception at all, let alone 2G, 3G or 4G. 3G is over twenty years old - at last in Europe. The US is often late to communications parties because the US industry players like to argue amongst themselves rather than co-operate and push technology forward.
The big leap will be when we stop relying on literally tens of millions of cell towers on Earth and switch to a satellite-based solution. The technology already exists but it's a long-way from being economical to deploy to consumers in the volumes required. But at the speed at which new satellite are deployed, viable solutions could be available sometime during the life of PlayStation 6.
I don't know what services you use but Apple provide movies streaming bitrates comparable to Blu-ray and for audio it goes up to 24 bit at 48 kHz, which is some way above CD quality. If you're experiencing poor-quality content then it's a combination of the service, the network and your ISP.
I was wrong with the 15 years thing. However my point still stands. We have 4g LTE / 5g now and still have data caps on our services. Now you are talking about satellite solutions. That will take years or decades to roll out. The closest thing we have is star link and that isn't exactly mobile unless you count mounting it on an rv. Having a satellite solution as viable in the playstation 6 life span seems really pie in the sky dreaming. PS5 launched in 2020. Ps4 launched in 2013. So that was 7 years. Which means PS6 would come out in 2027. Another 7 year life span would put its replacement at 2034. That is 12 years to design , get funding , launch and have a viable network of satellites. I don't see that happening and even then we don't know how long it would take for them to have a viable enough amount of bandwidth to allow tens of if not hundreds of millions of gamers to access these satilites to stream content while people are using it to access their normal content. Also in those 12 years people aren't going to be content with streaming ps4/ps5 quallity content. In that 12 years the 8k roll out will have happened fairly successful since its already started. So we will be streaming much higher bandwidth content too. Not to mention we may be moving past 8k at that point too. Most likely they will increase the color bit , add faster refresh maybe even go up to 16k for high end tv sets of 120inch or bigger. That isn't even taking into account vr and the need for higher and higher pixel counts there.
As for your last comment. Yes apple uses compressed audio for its content. They use a 256kbp/s with their own AAC codec . I believe amazon music hd /ultra hd had 850/3730kbp/s tracks respectively
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To be honest the majority of my music is ripped from my old cds in storage. I am kinda stuck in 1980s- early 2000s rock and heavy metal and of course 1980s/90s video game music cause I am that friggen cool
But you miss my point. Music is already a solved issue. Mp3 has been around since 1991. AAC which is what apple uses has been around since 1997 and FLAC has been around since 2001. These are all various forms of compressing audio while keeping sound quality as high as possible vs something like redbook audio. So if you want CD quality audio you can take say a 600MB cd and stream it or you can use FLAC which is lossless and would give you a file of around 300MB and stream that. Same quality but you need half the bandwidth. But you can go further. You can take that 600MB cd and bring it down to 50 or 60MB depending on the audio quality that you or your subscribers feel good about.
Now lets say that is a 60 minute cd. So now you stream it. You can stream the 600MB over the 60 minutes , you can stream the lossless compression at 300MB over the 60 minutes and need half the bandwidth to stream that or you can take that 60MB compressed file and stream it over 60 minutes. Obviously bandwidth required goes down drastically.
You have the same situation with video. They have made mpeg 2 , mpeg 4 and now I believe HEVC is the best one out which is h.265 or Mpeg-h part 2. The issue here is that while Hevc results in about 20% - 50% better file sizes it also uses a lot more compute power. You are also going to be looking at what 60MB per 1 minute of 1080p footage with HEVC ?
Now these are files that you have and can throw as much compute power as you want and keep them compressed in the cloud for when someone wants to view them . But with something like xcloud or the playstation version of xcloud well you don't have that option. It all has to be compressed on the fly in reaction to what the user has to do. It's going to take a lot more resources than something like video streaming or audio streaming.
It takes MS having the xbox series x hardware to do 1 4k xbox series x stream or 4 xbox one streams. Imagine optimized silicon for streaming movies or even audio and how many streams of each they could do in the same foot print as a single series x blade.
Now just imagine when xbox next releases in 2027 or something . Now you need to roll out brand new hardware at huge costs to the company to support people streaming games. With music streaming I am sure they run the current servers until they break and get a free upgrade on the amount of streams and audio quality they can dish out simply by it being x amount of years newer hardware. Most likely the same thing goes on with video streaming . Think about it , 4k was introduced in 2012. It's already been a decade and most companies only have limited content in 4k or limited content in 4k plus charge more like netflix. It's taking a huge amount of time to roll out 4k and that isn't a reactive technology.
With xcloud there is a lot more to it than just streaming already compressed content that is just waiting to be served to a customer