I think some of the new APIs and general PWA support (workers, indexeddb etc.) are the more important changes since Palm Pre / iOS 1. Sure, better script engine

I think some of the new APIs and general PWA support (workers, indexeddb etc.) are the more important changes since Palm Pre / iOS 1. Sure, better script engines and a few cycles of Moore's law seem neccessary, but that's sadly more of a reflection of all the performance wasted by the stack. I'd argue that most apps are rather passive when it comes to displaying stuff, don't have to crunch numbers and don't manage a lot of data. So an 80s BASIC engine would be enough for it, if the APIs are done well (or 90s Tcl/Tk). Games are an entirely different matter, of course. I don't see a lot of stuff in between.