The problem here is that this will continue to be the case for digital copies of movies as well, because of the simple fact that streamable/downloadable copies tend to mimic the quality of currently available physical media. DVD was the physical media, so we got 480p digital files. Bluray is the physical media, so we get 1080p (often just 720p) digital files. This is going to be the case in the future, IMHO. Which means each time the physical format moves forward, you'll need better PCs, more space, better internet...
That's exactly what I meant - you still either need a really good computer hooked to your TV (which can be difficult) or a standalone player (or console) capable of dealing with the latest on-line content. So in this sense it's not very different than BD or other physical media.