So do you also suffer from this alleged "cognitive retardation" when you maximise, restore and minimise applications?
No, in part because reminders of the open windows remain in the taskbar, and in part because I rarely use maximized windows on a desktop PC. I'm more likely to use half-screen windows with Win+left and Win+right. The Windows 8 Start screen hides even that. People who run all applications maximized with an auto-hidden taskbar might appreciate the Windows 8 Start screen, but I am not among them.
I'd also like to know how you continue to work on whatever while *simultaneously* using the start menu.
The Windows 7 Start menu and Classic Shell Start menu do not trigger the same psychological "change of scenery" as the Windows 8 Start screen.
So you look up the proper command as you would regardless of OS.
On any other desktop operating system, I would look it up on one side of the screen and type it in on the other.
Or are you seriously saying you can't remember "mstsc" for five seconds?
Allow me a brief reductio ad absurdum: If everybody's memory is as good as you claim yours to be, then why do PC window systems even show more than one line of text at once instead of relying on end users' memories? If that's not enough, as I suspect, then how much context is appropriate for a sighted user?