Finally Apple!
Having used my Galaxy S4 for two months now, I can say that it's an amazing device, and I'm in love with the 5" Full-HD display, as well as the 13mp camera. There is absolutely no comparison. Pictures, videos, web-pages, et.c. all look amazing on the GS4. For now, I believe it's the absolute best phone out there, together with the HTC One.
...That said, as a tool/productivity device - I'm having some small troubles embracing the GS4 into my work-flow. Our calendar at Uni won't sync with Android, and I miss the Apple eco-system, to some extent.
If Apple brings out a 4.7-5" iPhone 6, I'll be happy to return to iOS - but till then, I'll enjoy my GS4 and the openness of Android!
I'm most certain that the iPhone 6 will be the iPhone we've all been waiting for. I'm hoping for a gorgeous Full-HD display, 13mp high-quality sensor camera, and all-aluminum body reminiscent of the HTC One.