I will say the PPC has cancer in it's mid 40's. Which means its got a lot of hope and time left. A vast majority of programs are still being made on it.
We are only seeing a short few games jump to Intel-Mac only.
The real question is how much % of people own GAMEABLE Intel Macs (NOT a Macbook or mini) and how many people own Gameable PPC's?
I would make anyone a bet here that more people have game-ready PPC's.
I have a 20" iMac, and it' s a great machine. It eats my G5 in OSX "zippyness". But for games, my G5 has the clear upper hand with it's 6800 Ultra. The iMac is also a $1800 machine, which tends to lead me to believe that most of the mac-buyers will buy something cheaper like a mini or Macbook...which can't play games worth the asshole.
I still don't know if it's wise from a developer standpoint to only create a game that only less than 50% of mac users will buy, speaking that I'm estimating WAY more people have PPC's for gaming than Intel Macs.
As long as the PPC consumers are there, we will still be seeing games.
That kinda brought my hopes up, thanks, haha.