It depends upon the nature of the app: For example if you look at the history of videogames they tend to have a habit of always pushing the hardware to the limi

It depends upon the nature of the app: For example if you look at the history of videogames they tend to have a habit of always pushing the hardware to the limit. So you might not want to wrap that up as a web app. However many other apps are already websites wrapped into an app (think of Facebook) so the idea of it being served off a server isn't that crazy. In fact you are correct in the notion that as the hardware becomes better and as the bandwidth becomes cheaper and better that the web (or some future version of it) will be the way to go.