This is an unrooted Nexus 5, running the stock Google Launcher on the L Developer Preview. Chrome Beta has now added colored headers to tabs. You can also see the new animation for when you hit the top and bottom of a webpage. Lots of little animations all over for material design. Additionally, even though this isn't the final build of Lollipop, there is little to complain about. Operation is smooth throughout the OS. I turned on 'touch' points so you can see when I tap or swipe. Really like Lollipop. Final factory image build should drop within the next 48 hours. Def keeping my Nexus 5 and it will remain my iPhone 6 backup.