I purchased a laptop last month with 1GB or RAM, a great graphics card, and Windows Vista.
I personally love it! It is a completely new interface (took a while to get used to) and its not just the "pretty" colors and layouts.
The only problems I have had were with UAC (Which I disabled) and a few compatibility problems (one was caused by software Dell just preinstalled, but hey, I'm not complaining! They accidentally upgraded my HDD)
(You are glad, cancel or allow?)
Overall, I think its worth it. It has many similarities with XP, but more differences.
Vista, as with every OS since Windows 3.1, has failed to update the sysedit.exe ... and that is probably one of the oldest pieces of software you will find in your Windows OS.
Along with the updates of the interface, control placements, and whatever else, many of the preinstalled apps were somewhat updated.
Write and Notepad now support the well working Speech Recognition, and those pre-installed games were updated too. (So what? I like Solitaire...)
The OS seems to handle crashes better than XP, but I have yet to witness crash recovery. So far, M$ doesent seem to have much in their crash solution database, as its still coming up with little fixes for these things.
(I refuse to enable that stupid bubble screen saver!)
If you use XP, it will take you a while to adjust. It took me forever to figure out how to uninstall a program, and it was right in front of me. They changed the layout and text to suite newer users better.