> I'm afraid that it will look like a Cold War's arms race – one of the parties will invest so much that the other will just lose economically (not being able to afford that many developers).

Given all the "Safari is the new IE6" posts that have been here over the past few years, that seems to be already happening.

Apple is lagging behind quite a bit with implementing newer web standards, especially in areas where they have anticompetitive interest in doing so (PWAs cannibalising native apps). Of course, they're the only game in town on iOS, so that ensures them some captive market.