It feels like something that needs to be asked permission for, however, so it can’t be used for nefarious purposes.
If a website ever really needs to know my hardware, it can ask me to choose from a drop-down. A lot of users won't know what hardware they have—but, those users are also unlikely to understand the implications of a hardware-detection permission prompt.
Firefox removed the battery API for this. In theory you could do something like show a stripped down site for low power users or something but it was only ever used for tracking.
While browsers have been used for a lot now, gaming seems like the one place we have seen virtually no use outside of random 2D games. I doubt there is a single web game that actually makes useful use of the gpu vendor details.
“What is hardware?”
“Should I let a game know my hardware? Should I let a news website know my hardware?”