Okay, get me started, what is something? If they possibilities are endless, there must be a concrete example, right?
When I had a 56.6k modem, I was trying things way beyond it's capabilities as far as sending and receiving large files, playing games online, it was a disaster and there was very obvious and very real problems to be solved. And much more came after that, streaming movies!? Who knew.
With fiber, nothing seems to be coming close to pushing that limit from a consumer perspective. If there was something that was kinda shitty but still works okay on cable, what is it? Or what thing just isn't possible that is waiting for a faster connection?
I have a 25mbps connection, slow cable, and it does everything I need pretty flawlessly. Does it have to buffer sometimes for HD movies? Sure, not worth $50 more a month for that. I don't know what I'm missing out on with my slower connection, and if I am, people are doing a horrible job marketing what that is.