Ask Slashdot: Set Top X terminals?

JarrodL asks: "I have a large-screen TV, which just happens to have an ethernet cable running directly behind it. I got to thinking - Would it be possible to have some kind of set-top X terminal? As I see it, the advantages of having a dedicated X terminal on the TV are that it doesn't take away one of my screens, it can run at the resolution of the TV (rather than trying to cram 800x600 into s display which doesn't support it) and it is extremely cross-platform. I remember hearing that someone hacked an N64 to be an X terminal - does anybody know about that? Ideas, anyone? "