I am going to wait a while before even thinking about a surface tablet. Perhaps the PC based ones will be more interesting but RT based one seems awful limited at introduction. Essentially no apps or third party support for quite a while...
While I agree with you for the most part, but as limited as RT is, I'm not sure I'd be asking it to do any more than what I already use my iPad 2 for - email, web browsing, some note taking, occasional game or app but nothing im too attached to or irreplaceable (Bingo, Tapatalk, Splashtop) or isn't already available in the W8 App Store. That probably holds true for many people.
If I were using Airplay, had other iOS products (wife is dumping her iPhone next month), etc I'd be more invested and would use it for more certainly, but I don't, so I'm not.
I'm probably not on the market for a while, but it could renew my itch to try and move my HP Touchpad (nobody's touching it at $160 on Rumgr

) and consider putting up the iPad 2 to fund a RT purchase. If that effort lags into next year, then it would be toward a W8 pro then instead.
Not so concerned about the OS, support will be there, more concerned about the hardware, real world reviews and usage information.