I was pumped up by it too, but my issue with it is more the price. I could even learn to get used to the trackpoint, or even suck it up and bring a wireless mouse, but paying $1000 for it and it's supposed to be a netbook makes me have to really think about what the other options are.
I read on Engadget that the Windows 7 Beta actually ran on it a lot smoother than Vista. I would be more interested in running W7 on it, but I can't get over that trackpoint and price tag.
Though, I have been waiting for my time to own the TT. Moving up to that from the Air has me waiting another year to get it, so says the venerable wife.
Well - like anything you pay for portability. My UX's were about $3,000 each when I bought them in the US. The P is a ~600 gram machine with a very nifty form factor and premium Sony build quality instead of the plastickiness of most netbooks. To people who can't tell an Atom from a Penryn, it's a statement object too.
Let me be more specific about the new Sony's since you mention the TT. Part of me is regretting having changed wholesale from the TZ's to the TT's. I bought a mix of the 1.2 and 1.4 machines, it is a more advanced machine, the new CPU's do make it noticeably snappier especially on the lower models, runtime is decent and once you get used to the reduced pitch, the keyboard feels so much better for fast typing than the Air... but although it looks slightly better in styling terms, it definitely feels - and once you get past the superficial styling elements, looks - noticeably cheaper than the TZ.
So I'm not feeling the Sony love as much this time around - although of course, with nowhere near the ridiculous defects / lack of engineering sense of Apples it's still a better option.
The same could be said of the Z, despite the fact that it's arguably more of an engineering feat than even the TT. I really liked the SZ's performance in general and I think it looked very crisp and dignified. The Z, once again although it's a better machine in terms of hardware just doesn't feel as solid and look close-up as well built as the SZ did.
For me, the TT was a much more necessary purchase so I replaced all of my TZ's. I haven't had the same compunction, given my above qualms, to do the same for the SZ. So I still only have the Z's I bought to evaluate.
I was hoping for a direct descendant of the UX in a more keyboard-involved form, so I was disappointed that the P didn't have a touchscreen. Perhaps I'll replace my UX's when the next revision of the P comes out - but probably not this time. The P hasn't been clothed in 'carbon fiber' and I think it looks all the better for it. Carbon-reinforced plastic is in engineering terms a very good material for this purpose, but especially with the finish on the new flagship VAIO machines it looks chintzy.