I've hooked my laptop via HDMI to TV's at BLT, BWV, and AKV. I can not attest to the other resorts, but assume if they have an HDTV, they'll be at least one HDMI port in the back.
They are definitely HDTV's in Kidani
I'm not certain if you can access an HDMI port, though.
(Jambo was the first DVC with HDTV's)
Here, I found someone that says yes:
http://www.disboards.com/showpost.php?p=39275910&postcount=12
Thanks!!!!! We are in the process of setting up our Slingbox and just got our living room TV to broadcast to the computer. In theory we can watch our home news, any movies or TV shows saved on our DVR while we are relaxing in the Villa. Cool.