I had an actual real life use for iPhone mirroring today.
I'm on the couch with my Macbook, with my dog asleep next to me. Streaming Netflix from my phone to the tv. My movie ends and my phone is too far away to reach without waking my girl, what on earth do I do? Then I remember! I mirrored my iPhone, went into Netflix, found Rush Hour 2 and BAM, back in business. My laziness reached a whole new level today.