https://www.destructoid.com/images-of-prototype-mobile-xbox-controllers-surface-528963.phtml

So I guess MS wants to bring all XB1 exclusives to smartphones. Since most phones can't run modern games, I guess they plan on streaming the games to your phone? Either that or they are banking on phones to get a lot more powerful in the future. 

They're quite ugly. Look more comfortable than joycons though. Are they adjustable?

It's certainly an interesting idea for Microsoft to get into the handheld market. Instead of selling handheld hardware, just release Xbox Live/Game Pass to the billions of existing phone/tablet owners.

I wonder if Sony will do something similar, offer Playstation Plus/Now and a detachable Dualshock for phones/tablets, it would be their evolved version of the Playstation Portable line.

This is possibly cool, but I'll have to reserve judgement until I hear a full plan. Right now, its just a controller for phones. That's been tried and tried.

With that said, I'm always glad to see innovation in gaming. I hope MS can make something good happen here.

The front looks fine (though, I prefer symmetrical analog sticks), however, it doesn't look like those buttons and triggers on the back are going to be very comfortable.

I know it's all up to opinion, but having used the Switch quite a lot I doubt they are. The joycons are pretty damn comfortable, the only time they aren't is if you're using them as a replacement for the Pro controller (or if you get hand cramps easily and are laying down)

Exactly, an Xbox controller for phones/tablets in itself isn't anything worth getting excited about but if Microsoft or Sony bring Game Pass/PS Now to mobile devices than that's potentially a big deal.

Cool!

This will help support there streaming to any device feature. So i guess i can see why they are doing this.