Vicki Davis has a heartfelt post about Vista and how it has disrupted her mother's life. I am sure you've read it already, but if you haven't, please do.
I have been thinking a lot about Vista lately because several people in my family are to the point where they need new computers. My son-in-law, currently running PCLinuxOS, needs a new computer badly, but he doesn't want to get Vista until they get it working better. I was hoping he would be "converted" to Linux before this old computer died completely, but that doesn't seem to be happening. And even if he was converted, it's hard to convince someone they should wipe out everything that comes on a new computer and replace it with something else right away.
I'm also in the market for a new computer -- maybe. My Acer seems to have died again -- one month after the 90 day warranty on the new motherboard they installed in January expired. For me the decision is a little easier. I am committed to Linux. There is no question of giving Vista a try. But I still have the question of getting a new one and wiping out Vista, buying a used one and installing Linux, or buying a machine with Linux pre-installed.
Buying a computer isn't as huge a decision as it was 20 years ago, but it is still something that requires thought and planning.