We have recently started carrying another possible solution. Our
SW-8743 Will do High Resolution and does have a wireless option (if you have a wireless network, or wireless network card)
It uses a software application on your computer to find and stream video to the PC to TV box. You can connect it to your existing network (wired or wireless) or set up a peer to peer network just for video streaming
It still isn't as inexpensive as a simple cable, but you will get much higher quality than S-video, and will not have to spend nearly as much as the wireless VGA extender.