I'm getting it because it's a huge upgrade from my original Droid, which served me well for a about a year, but now the physical keyboard is pretty much useless, and I get force closes and sluggish performance every day (using Launcher Pro). My fiance has a Droid X, which she constantly complains about it force closing and having to do hard resets. My father has an Incredible, and it is silky smooth, and the TB obviously is a big hardware upgrade from the Inc. I also like the Sense UI on it, pretty cool.
I've been told by various people I should wait for the Bionic, or the iPhone 5, or the dual core phone from HTC etc etc, but by the time those phones come out there will be something better on the horizon I should be waiting for then. There will always be something better down the road, but this phone will be a beast, judging from the specs and all the videos. I just wish it would come out already!