WiDi requires an Intel wireless radio and both Surfaces use Marvell. You can't
install the netgear program on RT as well. Supply a link for the Roku bits you
are looking at and I will look at it, but it is doubtful. And there is no way to
broadcast wirelessly to a PS3 other than possibly Play To for media.
There is nothing that I know of that will broadcast the entire desktop. There
may be some expensive wireless HDMI that you can use on the Pro.
Barb
MVP - Windows Entertainment and Connected Home
http://digitalmediaphile.com/
Please mark as answered if this answers your question