If you find yourself in Planet Hollywood with absolutely nothing to do, then give the Miracle Mile a tour. Though I have never measured the distance from one end of the shops to the other...it does seem like a mile's worth of shops (though not as nice as it's Chicago namesake).
There isn't anything overpriced or fancy about the Miracle Mile shops, just a decent selection of shops to either kill time or find that shirt you've been wanting from back home, but didn't have the time to purchase.
Plenty of restaurants inside the Miracle Mile as well, so if you have time to grab a bit in between table games, night clubs, and everything in between, then stop by for a bite. Don't expect anything fancy though, as everything is basically glorified mall food.