The first thing you'll notice about the NXE is the upgraded menu system. Sharp graphics replace or augment the plain text in the menus. Adding more visual information makes navigation easier by exposing instantly recognizable options to the viewer. The new menus will also expand out to make full use of the screen in widescreen aspect ratios.
Submenus previously hidden behind menu text listings now appear in full preview mode to the right of the parent menu, showing you what's available without requiring you to select the submenu from a list and wait to load the new page. For example, if you're viewing Halo 3, you'll be able to see the featured downloads, screenshots, developer information, and other menus off to the right of the current display menu.