Despite of Ping added to iTunes, the UI for of new iTunes also changed, the left side changed all to Grey colour, all icons and text also changed. However, one more thing changed for iTunes 10 is the app sync option.
On the iTunes 9, you can search app at the top of the menu of apps list. Now on iTunes 10, there’s no more search box, but you can sort it by different categories and you can now only select “show only iPad apps” option in the menu as well. There’s less painful if you need to reinstall iPad apps on your iPad now.