your are so wrong. it does matter where show get air.
for one, Sci-Fi (Stupid-Fi) helps pay for the series. Networks like ABC or NBC aren't going to pay unless it has Huge ratings. So smaller Networks have to flip the bill.
for another, take the food network for example. would it make sense if they started putting random ass shows in there? no. not in the slightest, how about discovery? should they try wrestling too?
regarding PVRs, while i have one, and i know more people are getting them, its irrelevant. I still find myself searching for something to watch for 30 min or an hour here and there, and i'll end up on something like food or discovery, spike, or space...
it DUMB what they've done. If they wanted a station "without a theme", then make one. whats the problem?
why take a "Science-Fiction" station and put something else in it?