New Mac Minis to use NVIDIA's Ion platform
It looks as if this update isn’t going to be about power, but size and specific capabilities. At 1.6GHz and two cores with a 533MHz FSB, the Atom 330 is more than powerful enough to run OS X, although I wouldn’t expect to do any real HD video editing or RAW editing. You’ll have web, iPhoto, and hardware HD decoding — great for iTunes movie downloads.
I’d be afraid that the old Core2 Duo will actually outperform the new Mini, even taking architecture improvements into account, but I’m also guessing that the new Mini is going to be about the size of a 2.5″ hard drive.