I think it's a shame you got downvoted as well. Have an upvote on me.
As to the rest:
I've never heard anyone claim that the computers of today don't "feel" any faster than computers of 20 years ago,
Interesting, I find it to be a fairly common refrain. In fact, what I'm saying is basically just a paraphrase of Wirth's Law:
https://en.wikipedia.org/wiki/Wirth's_law
but if you feel that way I just don't think you're living in the same universe as those of us who walk around with quad core computers in our pockets.
Well, I walk around with a quad core computer in my pocket as well, and I still stand by that assertion.
Please define "other stuff" and where you draw the line between that and simply "browsing"
I'll allow that there's some subjectivity there, but when you're talking about a "web application" like, say, Microsoft Outlook online or something, or a programming editor or a CAD program or an image editing program, I can't help but wonder if that stuff should really be done purely "in browser" as opposed to being handed off to another program.
OTOH, I understand (some of) the arguments for doing it this way. Having a uniform experience for all clients, the security holes associated with plugins, avoiding the need to deploy software to individual machines, etc. I'd just like to suggest that people spend some time considering if there are other ways to achieve the same end(s) other than continuing to bloat the web browser until it replicates all the functionality offered by the underlying OS.