I am a victim of your title...
Comparing the looks of the TH and the iPod Touch, yes, it really is the gadget on the market that looks most like a TH. Funny how so many people go around the web shouting how everyone is ripping off Apple's designs, while no one is shouting that Apple ripped off the TH design. In my opinion, if you want to make it simplistic and glossy, it's got to look like a TH, so no rip off there. Although I still like the metal bezel over the all plastic iPod front.
By the way, the multi-touch interface also feels very like that of Piscel viewer, don't you think?
I can't comment on the functionality part because I have only played with ones at the Apple store. But if you do get one eventually, please do post your thoughts here on 1src. It's always interesting to see the thoughts on the "mobile OS X" from a previous Clie user's point of view.