I'd be very impressed that they were technically able to accomplish that. But I already own a PS3 slim and I see no reason to get rid of it.
With that out of the way, I'm very curious as to the implications for emulating the cell on something like the PS4. As far as I'm aware, the whole GPGPU special sauce in the PS4 has to do with running CPU code on a GPU (which in a sense, is artificially boosting your CPU type functions). The funny thing about that is that GPUs actually run CPU code astonishingly well. I'd like to see some of the research Sonys done on the idea because I'm sure they've looked into it.