Yeah, not a ton, I didn't write none. 3D modeling, cad, running scientific models. Gaming. Hi-res video editing workflows. Machine learning. I guess "crypto" junk. And some of that (machine learning, crypto, probably most compute-intensive scientific models) aren't something you probably want to do on a tablet or laptop except in a pinch, anyway, because a purpose-built server's much better-suited to it and you probably don't need continuous and detailed visual feedback.

But I don't think it's weird that people struggle to come up with ways to really use super-powerful hardware, because most folks don't do (and don't want to do) much of the above except maybe gaming, and most people who do game don't do it—or at least not in a way that's taxing on the hardware—on all the kinds of devices they own.

The cool stuff lots and lots of people actually use tends to end up in dedicated hardware or paths, like video codecs and image processing and face recognition and all that, not mainly processed by the general CPU or graphics power of their platforms.