First, why chrome? I imagine putting this amount of engineering into slimming down an existing browser engine would yield much better results (using CEF/whatever as starting point).
Second, Chrome already has a multiprocess architecture with renderers, why not just rent a boring server, and use renderer sandboxing (as in multiple tabs).
Third, Chrome as a huge OS footprint with GPU, sound, threading etc., non-optional multiprocess sandbox as of late, not sure how they managed to make all that work without a full-fat OS underneath. Cool if they did, but seems excessive.
Fourth, it seems to me they basically rely on 'hot pools' to actually achieve the stated perf goals, I don't really know if the majority of performance of this wouldn't be achievable via running a Chrome process on a boring Linux box, with X renderers running in the background, and dynamically handing them out to requests?
Edit: Also sorry, but please fix that paragraph formatting, it might work on mobile, but on a 1080p screen, it's hard to ready.
Also PS: By looking around on the website, they're demoing Doom 3 compiled to WASM. While an impressive technical feat, and may be the best demo for their usecase, I really hope the future isn't running a WASM sandbox, inside a chrome sandbox, inside a firecracker sandbox, inside whatever cloud sandbox this things runs on top of.