I had a iPad 1 for about 8 months before the new iPad 2, and it's become part of my life. When I go to leave the house I check for spectacles, ........, wallet, watch,cell phone, and iPad.
I use it for turn by turn directions, restaurant reviews when on the road, keeping up to date on forums ( like this very post), and plug it into my aux for music in my car. Would def suggest it's essential for Vegas to keep your schedule of activities, look up show times and numbers, and when you find a new place, to check for a good coupon.
Rock