Well to get back to the topic, if you look at the enthusiasm shown by Windows users fo UAC, I don't see this flying at all.

Also consider most still log in as administrator, and many attacks are at the applications layer these days, where the application is already approved and running.

Most Windows users don't want security..............I sometimes wonder how many could actually spell it

And AV/Security products are here to stay.................if you hadn't noticed there is rather a lot of money to be made out of that sector