In 2006, Ars Technica published an April Fool's article[0] declaring that the perennially-forthcoming Duke Nukem Forever would finally see the light of day... as... a browser game! Ho ho, how droll.
Crazy to see how far we've come.
[0]: https://arstechnica.com/gaming/2006/04/forever/
Quake Live did come out as a browser NaCl game a year or so later.
Quake Live did come out as a browser NaCl game a year or so later.