Honestly... I cannot say if I'll switch back. 
I have been an iPhone user since day one... With a couple of attempts at using Android... First time it took two months, second time three weeks before I switched back to iOS. 
This time though, I switched to Note 3... Almost two months ago, and honestly, the thing is everything I want. 
In regards to the future, only time will tell... If Apple create a large-screen device, then I'll be tempted... However, at that time I imagine Note 4 will be announced... I just can't say right now. 
One thing though... the iOS8 does look nice... It's getting closer to what I want. 
If I could decide myself, then I would like to see a device with about 6" screen, with the build quality of iPhone, running Android. 
A guy can always dream, right?