At the start of iOS it was "look, pretty icons" and "no more permission popups". But, most platforms had icons anyway, and all the apps now get the annoying popups for the same set of permissions (except for networking) that was the bug bear of j2me (at the time). iOS and Android got rid of all the permission boxes for a better UX.
So, we're left with the expectation of a seamless web. But it never occurs because of endless permission issues, of which the platforms try to reduce by providing a one-size-fits-all cloud solution (iCloud and Google), both of which allow relentless advertising & gamification of our personal information. It's so bad that governments all over are racing toward digital "identities".
I'll take the simplicity of j2me any day thankyou. The development environment was GBs smaller and faster and the problem set is pretty much the same. At least with j2me there was the idea of responsibility to data usage (I generally only get 3G, even now) as opposed to 40MB apps that download 100's more. All the apps I developed during that time were offline first and synced when available.
The real complexity I see is in the consumption of video and hi res images as well as the interaction with other apps (eg share menu). Unless I'm seriously mistaken, everything else was in j2me (even opengl). All the other complexity is in the tools we have these days & endless rhetoric on which ungainly monster is better than the next.