The web is not tied in any way to the desktop PC, in fact the rise of mobile is partly down to the ease with which people could switch to a new device and still

The web is not tied in any way to the desktop PC, in fact the rise of mobile is partly down to the ease with which people could switch to a new device and still have access to all their data, via the web. All Apple had to add to the iPhone to make it incredibly useful was a usable web browser, and the same will be true of our watches in 2018, paper thin news readers in 2020, or phones in 2030. Mobile binaries written to a specific binary API will have a hard time competing with the web, because of its radical simplicity and backwards/forwards compatibility. Of course the web will change, but I don't think it has much to fear from binary applications (desktop or mobile) - we've been down that road before, and we know where it leads. Platform independence is the web's most important feature, and as mobile ecosystems proliferate then consolidate, and hardware improves performance, I think we'll see consumers and producers reevaluating their choice to stay locked in to a world overseen by one corporate vendor.