Again, wishful thinking, but in my opinion if Apple made the GPU card in the 27" much stronger, added an esata port and a blueray/hdmi inputoutput, it would be pretty much the totally ideal computer in every way.
I know much of this is not possible, but anyway. Im started thinking about all this when we realised my girlfriends laptop (a really cheap hp) has a HDMI output. We plugged into my 42" plasma and used it as a screen, watching a few movies afterwards. We can dream!