You are comparing year one of DVD with year 7 of bluray? Last year wasn't a bad year, its been a steady decline over the last 3 or 4. Netflix, vudu, hulu etc... physical media is dying.
And some PC games are released on discs, many are not. I expect it will be the same on consoles going forward.
If optical wants to make any kind of comeback, they need a solution that isn't just huge capacity, it needs to be an order of magnitude faster than current formats. They have reached the limits of how fast they can spin a disc and it's still too slow.
I think the numbers cover vhs, dvd and blu-ray, so I am really not comparing anything just pointing out how sales were back then and I am sure it was a good business with those numbers.
And i do not expect optical media to make a comeback hell, it's not even gone now and it's in the ps4 and xbox 1 in order to make a comeback you have to be beat first, right? . I think it's a real risk that physical media will be gone in the next generation. Without any new format it's more likely, but with a new 300GB format there may be a chance
What pc games weren't released on disc?