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My early vision of the device would have it as a self-contained computer phone with a lot of internal memory.

With this, you use your phone to power a monitor that serves as a second screen, or attach a keyboard and mouse and use it like a PC. You can now plug your Windows phone (the Lumia 950 or 950 XL, specifically) into a dock and get three USB ports, as well as HDMI and DisplayPort connections. The idea is embodied in the new Microsoft Display Dock announced along with the Surface Pro 4 and new Lumia phones yesterday. I'm kind of surprised it's taken this long to appear, since the mobile phone has had plenty of power for the last decade. I'm not one to brag, but I've been predicting the mobile phone as pocket computer/desktop substitute for over 20 years.
