> Monitors aren't obsoleted nearly as quickly as computer hardware and most consumers have a TV.
And most people don't want to dock their computing device to their TV as a monitor; there are uses for TV-as-output device, and they're well-covered by things like Google Cast and similar technologies.
> You can take peripherals you already own and make a 1-plug docking station without significant cost.
Only if I already own peripherals; i.e., if I already have a desktop or a laptop that I use with external peripherals instead of just the built-in interface. And, I only need a "docking station" if those peripherals are wired, rather than, say, Bluetooth.
Which might be the case for the monitor, sure, but you can already do that. HDMI dongles or cables -- the only one-plug docking station you need in a world with Bluetooth mice and keyboards -- are readily available and not expensive for existing, non-Windows mobile devices.
