It would be mine. Even at the rumored 1.25Ghz G4, it'd make a great living-room hooked-up-to-the-TV Mac just to offload watching videos off of my TiBook. And I'd finally have an always-on Mac to remote into.
I still play more MAME on my "slow" TiBook than my fast Athlon, though. It's a convenience thing (and I rarely play the newer games...I'm more of a Dig Dug and Gorf kinda guy).