I agree. How do you think 5G will change computing? In my opinion, with that much speed at such low latency, strong processors and memory won't really matter that much and web app will be the go-to standard.
For most people, it won’t make an immediate difference. The current speeds easily stream video, which is the most intensive task for the majority of users.
Eventually the increased capabilities will result in services that use the extra speed and bandwidth. At that point SciFan’s observation will become important. Users that were used to their current data plan may find themselves either having to be careful what they do, or getting larger plans. Once the higher speeds become ubiquitous, competition should lower the prices of the higher tier plans back to what you can get with a mid tier plan now.
What will those higher data consumption services be? Probably higher res video (even if it seems wasted on small screens), more and better quality video conference/call apps, real time video and audio creation collaboration apps, a tendency for services to allow and use larger files (even if they don’t really need to), and stuff we probably haven’t even thought off.
Keep in mind that the majority of delays on the web are a result of server and network lags, not connection speed. The experience of web browsing and similar activities are unlikely to show much improvement. If it were not for that, the web might already be the standard; except no matter how low the latency or high the speed, it will never be able surpass local computing for some tasks (unless for some reason companies stop building powerful computers).
Some things will always be better with a local app. And some things will be good-enough to be web apps. Speed and latency will move the needle somewhat, but not to the point of making the web the only solution.