What's New in Ubuntu since 2010?

Well I'm not going to say "improvement", but as far as new, they are attempting to replace X11 with something call Mir - https://wiki.ubuntu.com/Mir/Spec

Mir will help make a better and responsive UIs and desktop experiences. But can the user notice that?

There has been some next big thing happening?

Ubuntu '11 was the first to use Unity as default.

It was also the last release I used before switching to Mint.

Is a real thing this Unity? I saw it and it seemed me a bit bulky.

Unity, amazon lens, upstart, upcoming mir.

In short, a bunch of stuff nobody really wanted.

My impression with all Linux distributions is that at the end are made for developers/techies.

There's a lack of user centric focus.