Obviously,  it seems you would prefer to download movies,  TV episdoes etc to your PC
As for me,  I think the experience will be much better on the PS3 for 2 major reasons
- PS3 hooks to your big screen TV (not a 15" PC monitor)
- PS3 is less complicated then a PC and turns on and off in 5 seconds while a PC takes a minute or two
True,  a PC can hook to most TVs,  but a huge PC/keyboard/mouse is out of place in a home theater setting.
If the PS3 internent browser gets updated some more and they fix some of it\'s problems then I (after HOME) will have no reason to use my PC,  except for ITUNES music downloads and PC games.  
For example,  if I wanted to watch a downloaded TV episode,  it would take me about 5 minutes to get it loaded up and viewable on my 15" monitor.  But if I had the same episode on my PS3 I could get to it in 15 seconds.  
That\'s me though.  Others may still prefer to use thier PC.  I just see the PS3 as a smaller,  faster alternative.