You can do this in the old fashioned way...
Start recording the show you want to watch on your gizmo from your HTPC / Server, which creates a file immediately under Video, then you can play it.
I don't know how things will go transcoding the file at the same time as it's being written to, but you may want to give it a try if "live" streaming isn't that important to you.
I'm all for a "Second screen" experience for gizmo on Tablets these days... Ability to control MC and see information on what's playing on Gizmo, be it a movie, a TV show, an artist, a CD...