I guess you mean 4K (also known as Super Hi-Vision) resolution but personally I don't see that resolution becoming mainstream for at least 10 years, And the PS3 and X360 can't even do games at 1080p reliably. As for the low number of games from major studios that is because of the increased workload that goes into a game today yes but is also because of the level of polish these developers demand from their games and the time it takes to create a game engine (something all these developers did) which PS3 developers were forced to do if they wanted good results on the PS3 (because of it's architecture) if you look at most of the developers I think you will find that they only put out 2-4 games last gen anyway.
The advantages of moving to a new generation for Microsoft in the next 2 years are quite great, they could move far ahead of the PS3 in technical power levels (over nine thousand) and they would lose some of the stigma over RRoD etc while allowing them to focus on more digital distribution. Microsoft won't have to take the 360 off the market like they did with the Xbox so they will keep that on the market to combat the PS3. Now why is this relevant you ask well Sony won't want to give Microsoft another big head start on the next generation and Sony would have the opportunity to move to a more conventional architecture making it easier for multi-platform developers (who are now very important)
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