Apple yesterday launched the iOS 11 public beta. The company recommends backing up your devices and not run it on your primary device(s). Public be damned, a beta is still a beta.
Personally, being the nerd and intrepid reporter I am, I installed the beta on my 12.9" iPad Pro this morning. I'm still getting used to it, but man, the new multitasking stuff is legit great. I'll surely have thoughts to share on all this stuff, accessibility included, in the time to come.