The web barely offers the things you describe. The platforms vary so widely in terms of display and input hardware, the standards change so much and are impleme

The web barely offers the things you describe. The platforms vary so widely in terms of display and input hardware, the standards change so much and are implemented with enough quirks/incompleteness, that it's really not a stable platform. What you actually end up with are apps that are really hard to test, very poorly integrated with 100% of the platforms they are used on, hard to find and difficult to use if your connectivity isn't consistent. And it's only going to get worse as WebAssembly really takes hold.