@PP
in your opinion, is buying a 1366 x 768 TV these days a good idea? bad idea?
Plasma - like which model?

Interestingly enough, 51" HDR plasmas are now 1024x768.
LCD - 32"?
It's a great idea if on a budget, value size and picture quality under the right dimmer/night time conditions (plasma), value both SD and HD, and sit at a distance (not such an issue with 32").
Not a great idea if you value HD and sit close, have bright conditions (plasma vs LCD, LCD would be better), etc.
So it depends. Nothing wrong with the resolution if you sit far enough. Most TV rooms I've seen always exceed the distance at which most people cannot distinguish HD/FHD.
What's for sure though, is that entry plasma still whips entry LCD in terms of PQ.