I'm still waiting for the day when my phone just "slots" into a dock on my desktop, and all the apps will "automagically" transform into desktop apps with keyboard/mouse shortcuts.

Not just talking scaling to whatever, or running a phone app on my laptop, but a complete "reskin" of the application for environment that is currently executing it. If we're talking Word, i want the mobile word experience on my phone, but the full blown desktop experience when docked into a monitor with keyboard/mouse.

You could even take it one step further and make the dock indicate the intended purpose, i.e. you'd have a dock in a meeting room that suggests "presentation mode" or "meeting mode" and instead of blasting your desktop to the screen/projector, it instead shows as a second presentation desktop.