Every time I do the swipe gesture to open up the activities overview on my laptop I am delighted at how smooth and polished it is now. It's such a small thing but you do it so often throughout the day that it matters. The way the desktop moves backwards spatially, how the icons slowly fade in, how the windows correctly stay at the elevation they were at based on how recently they were clicked, how the animation curve isn't flat but feels bouncy. Just nice! Same thing applies to switching between desktops. It feels a lot better than on Windows.