I'm not sure how you arrive at "web technologies are a dangerous threat to app store revenue", given that the iPhone was introduced with the best web browser ever made for mobile, and predated the app store by more than a year. Care to elaborate?
Apple and Google could lose tens of billions in revenue if they make the web too good too fast.
My team is actually developing a suite of tools and platform to enable Unreal Engine game developers to deploy their games to HTML5, bypassing walled gardens and 30% fees entirely.
Okay, so your POV makes more sense now. I'm a fan of the web, so I wish you the best in making the web a platform for non-casual gaming.
IMHO, if you view this primarily as a technology problem, you're going to learn that it isn't. Even when the technology prerequisites exist (Safari supports both Wasm and WebGL today), someone will need to solve the problems that app stores solve.
However these days, app stores have proven their massive profitability, so web tech on par with native apps threatens that income stream.
Offering reasonable functionality via web can be a huge win for certain app categories (anything with IAP or subscription) because it is easier to offer payment options that bypass app stores and their mandatory revenue slice.
Does it? Of the millions of apps in the Apple and Google app stores, can you list a few that were pulled in favor of web-only distribution once web APIs made a web app possible?