And only a handful actually tailored them to those specs in making anything above and beyond hi-res xbox1 games.
Developers (well, everyone) knew 2 years in advance of shipping roughly what hardware was going into the 360. You are suggesting that developers will be able to essentially throw a switch and BAM xbox 3 game.
No third party would thank MS for secretly making their awesome launch games while expecting them to put unprepared titles into the market place against them. It's the kind of dick move that N64 era Nintendo would have made. Optimised multiplatform titles take time to develop and if Xbox 3 was going to be ready to ship in 10 months all third parties would have titles in full production now.
Unless MS has gained +10 in secrecy I just don't see this.
I don't get your point. You're saying pc/xb360 ports won't be enough to move hardware? If so, I agree that those by themselves will not be enough. There will have to be some sign of what is to come that DOES take advantage of the hardware in some measurable degree above and beyond xb360 to really get sales moving.
The point was that you can't just pull hi-tech PC games over to your new console if PC games have become low-tech (so to speak) console ports. Quake 4 was significantly beyond the Xbox. Rage* is perfectly at home on 360.
*I actually think Rage is very impressive.
As for it being a "stupid" idea or not, as long as MS is making money and taking steps to ensure they have a profitable future, I don't think they care if some would think of it as "stupid".
It's stupid because it'd be ensuring they fumble the transition and prematurely kill the cash cow that the 360 has turned in to.
Edit: Anyway, this is OT so we'd better leave it at that.