Well, times change, and if you said DD hasn't moved an inch since back then, this would end up a sad discussion.
There is of course a major difference between the PS360 and the PSP, which is that the PSP is portable, meaning having all your games for on the actual console is quite an advantage compared to dragging your entire UMD library around.
For the home consoles, I don't think a PSP Go! model is viable yet, but we're certainly moving in the direction where DD of all retail games become possible, even though I don't know how this will turn out in terms of game size vs. storage.
And for the record, the only thing about the Go! I don't like is the price point, and swaying my mind will depend on controls and comfort of use.







