My cable ISP has caps too. I really don't mind caps, provided they aren't too low. They have to find some way to give people high speeds and somehow restrict people from saturating the connection 24 hours a day.
For me, a faster connection isn't just about more throughput, but more about having individual pages load faster, not waiting for videos to buffer, and being able to play a game on release day, rather than have to wait until the next day for the game to finish downloading.
For a mobile connection, I want the data I'm looking up to come in fast. But I know I'm not going to be downloading 4K movies on the bus. It would be nice, but I realize there are limits to what we can get.
I don't really think we need a 3.6 Gb/s connection on mobile, as most of the connections will be closed before the TCP window reaches that speed, but I guess it really can't hurt to have the capacity available when you need it. I guess it just realistically means they'll be able to have more customers downloading at reasonable speeds.