If they can fit it in an Macbook Pro, they can fit it in an iBook as well. The only thing is the cost, and since they can get it in the iMac for that cheap cost, they should be able to do the same in the iBook.
The shared RAM is never going to be as fast as dedicated RAM, and with the Mini you only get 80MB or something. Plus you loose RAM for the rest of your system, and we all know how much OS X likes RAM.
The Mini can't even play 720p H.264 smoothly from what I've read while the iMac can. CPU speed does help but the graphics system helps as well.
The shared RAM is never going to be as fast as dedicated RAM, and with the Mini you only get 80MB or something. Plus you loose RAM for the rest of your system, and we all know how much OS X likes RAM.
The Mini can't even play 720p H.264 smoothly from what I've read while the iMac can. CPU speed does help but the graphics system helps as well.