I remember when WebRTC was introduced, it was found that it became very popular and was used by almost every page. But closer inspection showed that its use was to get user's IP address for better fingerprinting. I predict that WebGL/WebGPU will be mainly used for the same purposes. Nobody needs new fancy features, what people really need is more reliable fingerprinting (this is proven by number of uses of WebRTC for…
And if the Chrome team is excited about a feature, then probably it’s good for ads or upselling other Google products.
Last I knew, the Chrome team was made out of people. If the people working on a new technology are excited about that technology, it probably means that they are excited about that technology. It doesn't say much about how excited the ad people may or may not be about it, other than indirectly by knowing that the technology people are allowed to spend time on it.
That is the link I believe you're referring to, but my guess is that it's going to be fairly tenuous. The set of things that the technology people get to work on probably has more to do with the set of things that they try to persuade the powers that be are important, and that set is more likely to be driven by their own interests and visions of what could and should be done on the web, than it is to be driven by what will make their paymasters happiest.
Sorry, I'm sure there is a much more brief way to say that.
(nb: I work for Mozilla)