Dekstop AV - is Vista enough?

Do the anti-malware controls built into Windows Vista mean that we can begin to think about reducing the amount we spend on third party desktop AV products? Discuss!

I’m sitting on the fence on this issue – so far. On the one hand there are opinions of the sort being aired on The Register as evidenced in this article by Thomas E Green who says “don’t rush out to buy Vista in hopes of getting much in return security-wise”, on the other there is this mostly positive – and somewhat critical – well written review from Joanna Rutkowska who concludes by stating “Microsoft did a good job with securing Vista. ”

Did they? Have they? What do you think?