I maintain some publicly used iMacs in a University and there's no way we can use wireless mice/trackpads as they would be stolen, and even if they weren't I'd have to replace batteries all the time. And, the Lion experience is compromised if you have to use a wired Apple Mouse. Full-Screen Apps are a pain because you have to click into Mission Control to get to another page - there doesn't seem to be any key/click combinations to scroll left or right, and Cmd+` no longer seems to work for toggling between windows within an app. So when I upgrade the Mac suites to Lion, I'll either have to disable full screen apps (if possible) or at least recommend that people don't use them. Apple really need to release a wired Magic Trackpad, so that public computers could use them. Never mind that silly no-wires philosophy, there are occasions when they are necessary.