Best I'm aware, a lot of these apps exist already. The step we've yet to reach is "having to launch" instead of merely being able to launch. We probably will for some of them, though.
Speaking for myself, the dystopian present and near-future has me a lot more worried than a hypothetical future with apps: I've lost count of the number of websites which used to work fine on a 1st gen iPad and which now either refuse to work on grounds its browser is too old (e.g. Github), or outright frequently crash its browser owing to out of memory errors due to excessive use of javascript (e.g. most news site).