I'm not sure. While I in general believe that the PS3 should logically stay more expensive, disregarding for a moment pure fabrication and optimisation skill, I have some issues with this breakdown:
CPU: Cell is bigger and arguably more difficult to fab than Xcpu regardless of size (we have heard a lot that Cell has a lot of logic relative to other chips, making it relatively harder to fab).
This is probably true, though Cell has more potential to become a mass-market device in some form or other.
GPU: RSX is actually quite large, weighing in I believe at 260mm^2, which is bigger than Xenos+EDRAM. Xenos is still probably at least as expensive due to being split, though.
Yeah, this should be at the very least even.
Blu Ray vs DVD: Seems DVD will have the edge here. Even when it's say, $10 vs $20, it will still be an edge.
Yes, but probably becoming fairly insignificant in the not too distant future. Of course, when eventuelly HD devices actually become cheaper to make than DVD drives, the 360 can always include it still.
Built in HDD in PS3: This is actually one that will take on increasing relevance as prices scale. HDD cost makes up a larger percent of the total as the total shrinks, because HDD costs dont shrink. HDD may be fairly irrelevant costwise in a $600 PS3, but it becomes pretty relevant in a $150 PS3, as Xbox 1 can tell you. Of course, two of three 360 sku's have this, but the Core should be able to plumb extreme low price points that PS3 will have trouble reaching, such as 149 and 99 dollars.
On the other hand, supporting both a HDD and non-HDD SKU could be expensive. And the PS3 can live without the HDD just as well - there just aren't any SKUs out there without one at the moment. If it becomes important, then they can still create a HDD less PS3. The difference is that maybe the 360 has a few more games then that actually work without a HDD.
In the end I see enough there to make say, 100 difference even as we reach mass market points.
I just don't know what will be more cost effective eventually. Having the BluRay for more space - even if it would be used only for localisation, which I'm pretty sure the exclusive games coming out in the next few months will prove isn't the only thing it will be used for, not to mention the Strangleholds of this world of course
- great potential there for future movie tie-ins! - and always being able to count on a HDD, those are things that matter too. Also the policy of Microsoft requiring specific Xbox hardware for peripherals could become an increasingly bigger perceived cost over time.
I just don't know if the difference in price is going to matter a whole lot here, really. I mean sure, the HDD mattered in the previous generation, but that was primarily because it wasn't commonly supported and online wasn't nearly as big in that generation. This generation?
I think in the end the games will still matter most, and a little bit also the previous generation's mindset. It's the xbox1 that conquered the American market, and it's the 360's job to build on that. I predict that the 360's success will be relative to the Xbox1's success in each region, but be more successful than each this time around. That means it will be a big success in the U.S., being a strong competitor to the PS3, a little less so in Europe, and much less so in Japan - at least for the next few years.
Truth is though, I have a hard time predicting things. Personally I think that the PS3 will have the software and the hardware edge over the 360 this generation soon enough, but that this will be offset by the fact that the 360 was out earlier and is cheaper. They will probably go head to head for a fair bit. The Wii is the thing that makes everything more complex though. How many people will take a Wii instead of a 360 and PS3, now, how many will still do so in two years, and how many will do so in four years?
What will happen to controllers? Soon we'll get the first PS3 bowling game, and it will be interesting to see how well the motion controls work in that game. How well will the Vision camera / new EyeToy really work for motion control? What will the new PS3 controller look like with rumble, whenever that is released (I don't expect it within 6 months). Will the 360 come with more peripherals in the near future? How successful with the GunCon3 be? Will it become a universally supported device or not?
Too many questions!