As it stands now, probably won't work with 90% of the TVs out there.
Not sure all the ins & outs, but AFAIK it doesn't output any true "standard" resolution that a TV would accept. It just happens that the scan converted PAL, HighGFX, HD720 all work on a good portion of monitors out there.
HDMI can be even more problematic than that. A friend of mine bought a media PC to sit under his TV which had on an board ATI graphics chip. It wouldn't work with the Toshiba tv in his living room at all. He eventually found a TV that it worked with but it was easier to put an nvidia card in there.
I have a problem with outputting sound to my Toshiba tv, which meant I had to keep going into the test sound option in windows for it to sync. Fortunately I found that forcing the driver to use one rate and resampling, rather than using the rate the app was using, meant I didn't have to do this.
So I don't know if Toshiba HDMI is really bad, it works fine for PS3 & Tivo but seems to have issues with PC's.
