Two problems with that. A) New consoles are pretty tightly supply-limited on release, so people won't buy the game until they know they can pick up the console.

Two problems with that. A) New consoles are pretty tightly supply-limited on release, so people won't buy the game until they know they can pick up the console. You've totally killed the preorder market. B) You risk losing even more game sales towards the end of the console lifecycle, as soon as rumors start flying around about new hardware about to hit the market.