Don't sign me up- I just wanted to say a few things.
If new systems don't come out, several adverse effects occur:
a) Games can only get so good.
-Graphically
-Depth-wise (SMRPG could never have been on the NES)
b) Once games reach their peak (graphics, depth,innovation) all games would start looking the same. (Banjo Kazooie, DK64, and Banjo Tooie come to my mind) Eventually, people would become bored with cookie-cutter games, even if they all pushed a system to its limits. Consequently, games would no longer sell well.
c) With no profit, companies go out of business. (I can't assume anything about you people...) With no game companies to make games, games don't get made anymore.
That would essentially end the gaming industry, retro gaming aside.
I am excited about the Dolphin (Star Cube?). From the press reports I've read, it will be a true gaming machine. None of these Mickey Mouse add-ons to make it an end all 'stereophonic multimedia entertainment center' (PS2 cough cough) will be present for the Dolphin.
Besides, a Mario game for the Dolphin would have to be better than one for the N64.