I use RD from my laptop while sitting in my living room to use my primary machine for everything but playing games. I can play videos and they are perfect. If you have slow issues with RD then you have network issues or your machine is saturating with torrents or something.
I do have QOS across my entire network, computer, switchs, routers, etc. and 3389 is top priority so that does make a difference.
There is nothing I've run across that you can't do in RD or TS. It's recommeneded not to install software while in a session but I've never had an issue.
Also, one of my networks has 60 dumb terminals in two cities all going back to the main office, they are just as snappy as any new computer with office apps and web browsing. Just gotta have it all setup right.
RDP will take around 32k per client at the most, except for when you print, you don't need a LAN to get full speed out of it. And it doesn't matter what you run on the server, only image, keyboard and mouse, and sound are transmitted. Nothing application or even windows related goes over the network.
Ok, I'm done rambling