Email, web surf, some programming, music, movies, all the regular stuff.
I actually wrote up a document to explain to people why they should save their money because in a lot of cases there is low return in speed for the dollars spent. Never did post it anywhere, I figured PCMag and sites where it would do the most good would be pissed if things like that got posted, because they live off reviewing and advertising the latest and greatest stuff.
Power professionals, yes, they need all that stuff.
I's rather have 2 $500 computers than 1 $2000 computer, but that's just me.