If you ask me it should be the other way around, do we need web apps at all?
1. Most web "apps" actually only work on Chrome, so there's that. So much for the open, standardized web.
2. Most web apps track the heck out of everything you do.
3. Most web apps are sluggish and use more resources than they should.
4. Most web apps are like Juicero, expensive solutions to non existent problems.