Realistically, it doesn't really enable anything new. It's largely a replacement for the ESP8266. It has a few more features of course, but I think the point of early RISC-V products is that they're comparable to existing ARM (or other ISAs) products in their respective spaces.
I like that the ESP32-C3 is a RISC-V chip, but I realized after playing with it for a week that it turned out to not mean much - that's probably because I'm a pretty simplistic user though.
A few years ago the only Wifi MCU you could use Rust on was an obscure Realtek one - because it had an ARM core. Having a standard core would've been a great benefit back then, but it seems like nowadays all the tooling you need has been ported to their current architecture as well.
If I go through my parts box it's not hard to find Wifi modules that require a substantial amount of config and in some cases a solid understanding of how WiFi works. And they were 10s of dollars a unit. I'm delighted that modules like the ESP8266 showed up and made it easy and shockingly cheap. There was a real windfall moment when Arduino syntax was ported to the 8266, and Espressif has really taken advantage of it.
Sadly I haven't found much new it enables yet either (because at this point Xtensa is quite well supported too).