I have used both the Silverlight and WMP based players and haven't noticed that much of a difference. I do most of my viewing on a 14" screen however which doesn't lend itself to resolution critiques. I do have my desktop hooked to my TV (analog) and have watched netflix on that, but I literally had to fool my video card into thinking I had a VGA monitor attached (VGA Dummy), that's how intrusive the viewer is.
It seems like if they were limiting bandwidth with the new player it would be another way to discourage this practice of viewing on your TV, as well as save their servers some work.
I'm currently waiting to try Boxee on my desktop (dual boot ubuntu/XP), but don't know if a 1.3Ghz P4 will handle it. That is one thing I have to hand to the netflix player as it will run on computers that can't even handle hulu.
Take care of the luxuries and the necessities will take care of themselves. -- Lazarus Long