Imagine this....
You wake up in the morning, and you check your phone and you find an e-mail from work that you need to address. You have a laptop that consists of nothing but a keyboard, touch pad, screen and power supply. You wirelessly dock the phone that's in your pocket to this device and suddenly the same apps that are on your phone are available in front of you on a larger screen. The app UI is different on the laptop because of the available real estate. As you finish addressing the work task, a pop-up reminds you that you need to take your car to the mechanic.
You shut down your laptop and grab your tablet, which consists of nothing but a touchscreen, a Windows and back buttons, and maybe a couple of ports here and there. You reach the mechanic and as you expected you have to wait a couple of hours for your car to get fixed up. You wirelessly dock your phone to this tablet and fire up Poki and start catching up on your missed articles.
The two hours turn into four. You head home and you're tired. You decide you want to play a game on your TV. You wirelessly dock your phone that's in your pocket to your Windows 10-friendly TV and suddenly your UI changes to accommodate the large Plasma screen. You play your game for an hour or so.
It's getting late, you exit the game and shut off. You hit the sack, but before you do that, you set the alarm to wake up to another beautiful morning of Continuum heaven.
The "wirelessly" part I made up, but I don't see why docking must translate to a physical wired action.