readers may find this article helpful in knowing what is happening with wireless HDTV IP.http://www.edn.com/article/510530-Th...onnections.php
Of course it begs the question as to why you would want to have "less than full HDTV", go to great effort and cost to make it work then perhaps pay monthly for it when it already exists and you can have full HDTV for free? But hey, I have a bit of bias on the topic.
That said, I even use wireless for near HDTV signals in certain situations. If you are wanting to view internet based playback from say ABC.go.com I have found that dedicating a g/n router to one laptop (i5, win 7, 4 gigs, unshared 1 gig video memory and using Firefox) for play back works the best.
For me, I will hold out for HDbaseT (wired HD over CAT5e/6 cable with IP routing) as the OTA alternative to HDTV but we will see what CEA and the consumer (if given a choice) favors.