Not the way you're thinking no. I meant set-top box analog output -> TV card in computer. You'd get SDTV out of it.
Ah, that makes sense, yeah... but indeed not the way I would like to use it.
If you require a set-top box (that is, if the channels on the TV itself are useless) then there's not really anything you can do but have as many set-top boxes as channels you want to watch/record simultaneously.
Indeed. That's what I've also gathered.
I really hope there will soon be a solution released for this...