Well, it seems there's a lot of people who believe WebGL, HTML5 and asm.js will once again make the web a serious challenger to the App Store in the casual game

Well, it seems there's a lot of people who believe WebGL, HTML5 and asm.js will once again make the web a serious challenger to the App Store in the casual games category in coming years. But there's still the problem of monetization when there's no easy micropayment system similar to the in-app-purchase systems that iOS and Android have. It'll be interesting to see how it plays out. I'm also pretty sure that Stripe is gunning for the "micropayments on the web made easy"-crown - their integration with e.g. the Humble Indie Bundle is already pretty slick.