Good points, sounds like you have a bundle of great toys
I want a reader for reading epubs and possibly some RSS content. I have a DroidX that I use for connectivity and socializing, and I don't see any reason to try and duplicate those functions on another device - especially a 16greyscale/slow refresh device
I also have a laptop where I do all my 'real' computing. I see the appeal of tablets but for me, I'd think they be as bulky and inconvenient as a laptop with the same functionality of my PDA.
It's great that there's so many devices to choose from though. The Touch is so cheap, even if they release a 9.7" in the next couple of months I won't feel bad about this investment.