I completely agree Blanka. 2 years ago we ditched our satellite TV/cable, and have been since using our xbox360's netflix instant streaming for movies and an app called Vuze :http://www.vuze.com/
to stream our downloaded TV shows directly to the TV/xbox360. We haven't missed a single episode of our favorite shows, and so far netflix streaming has featured some pretty cool obscure films that I never expected to see available.
I might be in the minority here in that most of my DVD collection are rare import titles (mostly animation, since I'm an animator) that will probably never make their way to blue ray releases ever, or that, I'm not really interested in most of the mainstream popular titles available. I don't mean to sound snobby, but that is hopefully what the future of IPTV will hold; special interest viewing channels. Hopefully it will evolve in to that someday, and who know, there might even be a dedicated arcadecontrols.com channel! However, as far as plasma technology goes, yeah it's a bit power hungry- about on par with a fast computer with a huge GPU or a couple of CRT TVs. And the newer panels are getting more efficient with each generation of technology. But the bottom line is that the quality is here NOW, it's affordable
http://www.bhphotovideo.com/c/product/501281-REG/Panasonic_TH_37PH10UK.html and it's perfect for arcade gaming IF you have space for it. I don't think there's a single comparable LCD ips display at that size that comes even close to the price/picture quality of the plasma I linked. However, the only real negatvie about using a plasma for arcade gaming is that the smallest plasma flat panel available is ~32" most start at 37" which is huge for a cabinet, but perfect for a showcase cab, or a living room game station like mine (note 1080p panels start at 42"- but I find 720p looks great, and plays my library of DVDs beautifully).
I love my Panny plasma so much, i'm planning on upgrading next year to a 65" for the living room, and keeping my 37" dedicated to playing arcade games and DVDs in my music room.
Sure there may be future technologies that come out in the next 10 years that rival plasma in terms of picture quality, but right now, for me plasma = CRT in terms of arcade accurate color/contrast/and picture quality.