Vice City becoming playable in a browser is a really interesting development, especially for a game that has remained so recognizable for more than two decades.
What stands out to me is how much browser technology has evolved. Experiences that once required a full PC installation can now be accessed much more easily through modern browsers, which makes classic games more convenient for quick sessions.
I still enjoy revisiting GTA Vice City, and there is also a browser-based version available on BunaGames
Game came out in 2002, it was never a DOS game indeed - the site DOS Zone emulates DOS through HTML5, it's a misnomer if anything - the executable isn't a "DOS" version indeed.