The interesting thing is how much TV _hasn't_ changed as a format. The resolution has increased, the aspect ratio has changed, but these are simply parameters. Fundamentally, we're still sending signals that get decoded to form a linear stream of data, line by line, with the same blanking and synchronization signals as would drive a CRT monitor. The color encoding and compression is very different, as is the horizontal scan rate (and subsequently the number of lines).

As a paradigm, it's not too far off from what we had before. I think the web has taken a much larger step away from its original requirements and implementation details.