Stevey: Those people can pick up TP whenever they want after they buy the Revolution.
Really the only backwards compatability that truly helps the Revolution is the NES and SNES compatability and even then mostly the SNES.
The reason for this is that both systems are over like 12 years old, and many new gamers haven't played everything available for those systems, and those that have may not have their originals.
Super Nintendo was also the era that brought 2D gaming to its pinnacle state...so you can find the best 2D games ever created on that system...games that stand the test of time even today.
To a lesser degree the Nintendo 64 backwards compatability may help. This would be because there were some great party games and multiplayer games on that system that several people would love to play again.
So it isn't the Gamecube games that would allow for a small drought between a Spring/Summer launch and Christmas games to be acceptable, but the older games.
Another side note. Having backwards compatability also allows Nintendo the freedom to work on new franchises more instead of old games. With the revolution if I want to play Mario Golf I have 2 options the Gamecube and the Nintendo 64 version. Same with Mario Tennis.
For my Mario fix I have 5 2D Mario games to play and 2 3D Mario games...so I am happy to wait for a perfect Mario Revolution.
Puzzle Games: I have a huge variety of Nintendo produced Tetris clones, many of them the best ever created. With the Revolution and Nintendo's old library I won't need to buy another Tetris clone again.
Racing Games: 3 F-Zeros, 3 Mario Karts, FX-Racers, Uni-racers, Do you need anymore?
The point is. Revolution will have a large enough selection of games that will play and look good because they are from the pinnacle of 2D gaming. People will buy those games, and they will be happy.
In fact upon release of the Revolution I am buying 2-3 256/515 SD cards (depends on price) and I am just going to download every SNES, N64 game I loved growing up. Then I will pick up a few of the classic Nintendo games you have to own as a game enthusiast.
If you doubt that every hardcore gamer won't be doing the same your crazy. I also see several casual gamers doing the same, because it sounds cool to do. Yeah I have the original Mario, but I also have All Stars SNES version, and the new one Nintendo released with even better enhanced graphics.