I did this yesterday with my microhdmi to hmdi cable and a hdmi to dvi-d-adapter. Works like a charm: You can set this up like on any windows machine: just 1 desktop (1 or 2), mirror and extend. The full resolutions of my TV and my monitor were supported (1920x1080 and 2048x1152). However extended-monitor setup is a little bit tricky in daily use, since one area has to be in desktop mode, while the other is in modern-ui-mode. Switching which shows what is really ... special. Two tips: Get used to the special tricks and use a mouse our the touch-pad - the cursor isn't showing on the second screen, if you want to use the touch-screen in mirror-mode.
I'm thinking of doing a how-to or look out for some video, explaining this.