If Office 2016 is anything like Visual Studio 2013 then there will be lots of screen space wasted with cloud nonsense you will never EVER use (do Microsoft make updates of Visual Studio often enough that I need a flag PERMANENTLY on screen to light up when they are? No, to be frank).
So it looks a bit more 2007ish and a little bit less Windows 3.1, but still boring, flat, plain, cheesy and outdated. Actually, reminds me more of Word 2.0c now - go figure.
And will they have fixed some of the UI inconsistencies? Unlikely. Will they have fixed the VBA problems in Excel? Doubtful. Will they have fixed the dreaded pagecount bug first discovered in Word 2 that is still open today? Almost certainly not.
So... why bother with MS Office any more? Really? All they do is make it look a bit different but don't bother fixing the things that stop you doing your job. Right now, Libre and Open Office look a better bet because I can actually get work done in them. I'd pay money for them, but I wouldn't even bother installing Office 2016 if you gave it to me.