I saw a Fascinate today (actually, one the other models that are the same as the Fascinate) and wow - the screen really pops. The colors are definitely over-saturated, but since the screen is so small, what would be horrible on a big-screen TV actually looks pretty compelling on the small form-factor. This was indoors, but it looked like it would stand up to full sun quite well.
The size of the device (I held the T-Mobile and I think AT&T versions? - whatever the other vendor is) was really not much larger overall than my Droid - sitting them side-by-side they are very close. In hand, however, the Fascinate just felt "more bigger"
)) than it should given the actual size difference. I have large hands, so no issue for me.
I appreciated how thin it is, actually less obtrusive in my pocket than the Droid. I rarely use the slide-out keyboard on my Droid so giving that up would not matter to me.
The Samsung UI add-ons are nicer looking than Moto-Blur, which looks amateurish to me.
I used to go two years between phones, but I think those days may be gone - too much exciting stuff coming out. I'd like to wait to see new Android phones that are coming out with faster processors (2ghz is on the way from what I've heard), but the Fascinate did fascinate me much more than I expected. Nice looking package, gonna tempt a lot of people.
That said, comments about Samsung's past tendency to abandon phones, and deliver slow updates is very concerning...I'd have to look into those comments much more closely. Also, of course, root is required, so no root, no Fascinate for me.