They already have the iMac g4 with the round logix board and what not. But if they tried to fit that 12" wafermagig into the round iMac case which I believe is also 12" they would have to enlarge the bottom base to say, 16" and then make the logix board a bit less compacted, then put a round processor assembly above that and attach it in some sort of way. Then we've got the problem of heat. Lots of it. And the optical drives, hard disks, etc. Cramp all that in there, we've got serious therrmal issues. The only way I think they could maybe possibily perhaps pull this off, is if they made everything really, really, flat. Use laptop sized drives, or even an "all drives external" setup. Then they could make a very big and very fast fan that revolved around the top of the base, but low enough to be big enough to really get most of the innards. Then put the holes at the top... A preforated Mac who's preforations are not a good place to drop small objects. And it's loud... with that one big fast fan... Getting down to the point, I don't think we'll be seeing compact G5's any time soon, much less PowerBooks.