I'd love to know that as well...
Does the recently updated slingplayer app for ipad supports 720p/1080i?. I have my tv box at home setup with 720p... i also have the slingbox pro hd and plently of upload bandwith (35mbits).
The new ipad has like 4 times more the resolution needed to display a 720p picture.
It would be a wet dream (lol) to see another slingplayer app update supporting 720p/1080i streaming, AND THEN use airplay to mirror the stream (in 720p/1080i) to any HDTV, using the new on-screen sweet remote capability recently added to the ipad as the controller. Like i said, a dream