Whats next for WP8.

I am a WP lover and I follow every single news of WP.

It started when I brought my Dell Venue Pro in Jan 2011. I was lucky to get NoDo and Mango updates on it very soon.

Currently, I am waiting for 7.8 update on my Pro. I know we now have WP8 which is mainly a hardware upgrade and nothing significantly from software side.

So whats next for WP? WP 8.5? WP 9? Features? Predictions? Release Dates? Timelines?