Google and Apple, which already battle over mobile operating systems, are opening a new front in their fight. How that plays out may determine the future of the web. Google was born on the web, and its business reflects its origin. The company depends on the web for search and advertising revenue. So it isn't a surprise that Google sees the web as key to the future of software. Front and center are web apps, interactive websites with the same power as conventional apps that run natively on operating systems like Windows, Android, MacOS and iOS. Apple has a different vision of the future, one that plays to its strengths. The company revolutionized mobile computing with its iPhone line. Its profits depend on those products and the millions of apps that run on them. Apple, unsurprisingly, appears less excited about developments, like web apps, that could cut into its earnings.