Your internet speed and latency may be fast enough for the current media/mediums on the internet, but I think it would be naive to assume (without strong evidence/reasoning) that "there's nothing left to be invented" which might consume more bandwidth, or require lower latencies in the near future.
Reading some of the comments I see that I don't have the same use case (data cap, so never streaming video ; and rarely need to vpn or do remote work with only a mobile connection available).
I am excluding future usage though (biggest I could see is "That smartphone is your only mean of connection to the net, either via the device or when acting as a modem.").
