It would not have made more sense to have an "App for that"? Kinda hard to get to the app icon when the screen locks up eh?Ctrl-Alt-Del is a necessary keystroke sequence in Windows having nothing to do with stability. If your device is on a network requiring log in capabilities, the prompt is reached by pressing those three keys. Similarly, if you wish to lock the device, you need those three keys. I imagine the Slate is being marketed as a business tool meaning the expectation is that they will be used in company networks. If they are running full blown Windows, having those keys is a must.
My comment about the Atom was with the consideration that the Win7 OS is a resource hog. While I'm sure that they designed the Slate to be a faster device than a netbook; there are some limitations with regards to performance that exist due to the size of the OS and the number of instructions that need to go through the processor to run it. By basic design I just don't see it being a faster and more energy conservative device than the iPad. If they had ditched Win7 and developed an OS specific to the Slate (or PC designed tablets in general) then maybe, but they did not. Also you need to consider how PC security software will affect the device in the long run; as the security software becomes is a resource hog and will continue to add burden to the processor as more virus definitions are added. iOS does not suffer from this cancer and is the reason why the devices remain as fast as when they were first released.