said by BiggA:Roku can easily be replaced when something better comes along. You're stuck with what's in the TV (although you can always add a Roku or ATV to it). I'd connect one to my network if I had one, but I doubt I'd use it very much.
I don't understand the comments about being stuck with what's on the TV. My one 'smart' TV takes firmware updates all the time and there have been occasions when new apps have appeared. Same as with Blu-ray player, network receivers, etc. Yes, manufacturers are not going to keep updating forever as they need a reason to market new models I guess. But on the whole you are not stuck with what came out the box. Maybe some brands don't ever update?