The new layout for the remote app for the Apple TV was enough to draw me in. Accessed through Control Centre with a swipe up, it now takes up the whole screen. Although, I'm not sure how you exit. I guess with the home button or gesture.
The update to the Apple Pay interface is nice as it will show past transactions but the one I wasn't expecting is the ability to start a search then click an arrow to add the term but to allow you to keep typing. This makes searching in Safari much better. I think Chrome did this already and eBay too.