well to think about it, all these current smartphone innovations were already existent in 2007, but not in touchscreen form.
My 2007 Nokia N82 had xenon flash, FM radio, wifi, tethering capabilities, IM, full mobile browsing, flash, social networking apps, turn by turn navigation, front facing camera, video call capabilities...
So in the past 4-5 years we've focused on improving UI and making it a touchscreen friendly device. I know that when the first iPhone came out I mocked it because it lacked the features of my N82. Over the past 5 years they've brought in changes slowly to match my phone.
The next big thing is a slow change. It'll be dictated by tech trends, which point to social networking, gamification, etc. as well as entertainment like home media, media server, PMP, etc. From now on there will still be innovation but expect it to move at a slower pace.
you pretty much nailed it as we have pretty much peaked at adding things on the android side.
apple can still add alot like dlna support and open it up to devices other than apple made things.
like when I turned on near by devices on my gs3,it picked up 2 dlna laptops an onkyo audio video reciever,and 2 plasma tvs that were in the house and sitting on the couch with my tv remote and my cell in my pocket I was able to browse my phone and blast pictures and movies to our big screen tv.
I can see apple smashing it big with adding dlna on there 5s and that would be huge for them.