Now if they can figure a way to upload your license to your phone that's acceptable to the law I'd rarely have a lump in my back pocket.
I have my license and my wife's scanned into Evernote. A few months back, she was registering for a 10K and needed her ID, but didn't have her wallet with her. I pulled out my phone and showed them a full screen color scan of her license and they accepted that!! What is great about Evernote is that if I wasn't there, she could have done the same with her own phone since we use one account.