I listened to tuaw's show last night, they'd gone from 1/2 of them getting one after the announcement to everyone but one guy who's going to replace his MBP this year saying no.
They all agreed it's going to be a commercial success and that the people who were trashing it were doing so without seeing one or using one.
The other thing I read that was thought provoking was someone musing that if Apple had gone ahead & essentially copied say a Dell Mini 10V and Apple'd it, and sold it for $600-$700 it would have done pretty well.
What will be interesting is to see if the 2-3 lb tablets with 2-3 hours of battery life running Windows 7 and a touchscreen UI do as well as everyone seems to think they will.
Android doesn't support Flash yet, so on the browser front it's the same, Android is essentially crippled with it's internal RAM limitations for app storage, so that'll be interesting too. I had to hack my Android phone with a custom ROM to bypass the app storage issue and use more than a dozen apps.
Balmer called the HP Slate "sort of a prototype" which translated means it doesn't actually exist yet. The video at CES was a promotional thing, and it's demoing vaporware at this point.
Arcos's tablet isn't meeting the expectations of it's purchasers yet from what I read.