A few years ago, I was in NY for a conference in Manhattan but had switched to a hotel in Jersey for a few days to see a friend.  Once I switched back to Times Square, as I was getting dressed for a Broadway show it hit me: I had left all of my dress shirts in the Jersey hotel.  
Long story short, I request an uber in the middle of NY rush hour saying that I was at the Jersey hotel.  After a minute, I called the driver and explained the situation.  He was happy to help and the hotel front desk had the shirts waiting when he arrived.  He took them to the resteraunt that I was eating at on Broadway and much to my shock, the hour long process had only cost me $21.  
Needless to say I tipped the driver with cash.  
I remember thinking: This is going to be a thing VERY soon.