Here's ATI s info on screen resolutions.
PC2TV
Here's a review of the card.
extremetech
This looks like a smoking "all in wonder". For now it's an NVida killer.
You should bear in mind that due to the fact that it's a brand new, cutting edge, video card it's bound to have some bugs. I don't know if the dust has even settled with vanilla flavored 9700 pro. Note the 9700 pro all in wonder is the newest and a different card than the 9700pro. Be sure of which card your looking at. You want the all in wonder. I've seen/read enough posts to know that some folks are having problems.
That's not to say it's a bad card. On the contrary it's great. It just takes time for some new hardware to "settle in" at first. Of course that's been true of ATI for some time.
If you have a nice, newer/speedy machine this can work out nicely for you. I wouldn't plant this card in a Win98 Compaq/HP.
If you don't have a Sound Blaster card you should consider getting one to go with the all in wonder. Run the whole thing through a stereo reciever that your tvs hooked up to.
Next thing ya know you've got
StrongBad in luxurious stereophonic HDTV.
It's still awesome.
Seriously.