Some hotels are beginning to experiment with keyless entry into hotel rooms. The hotels outfit their doors with special technology so that guests can use smart phones to open the doors. There are some issues with this, however. The biggest problems that have cropped up so far are convenience issues and issues involving guest security. However, major hotel brands have said they are working to stay "ahead of the curve" on these issues and are working to make this modernization become a better experience for their guests.

Interesting technology. This is not high on my list of hotel needs, though - it just seems too prone to security issues. Plus, it is easier to whip out my hotel card key vs. my iPhone. This could be a benefit, though, if you had an Apple watch.