Hilton Worldwide Holdings is prepping for a major technology update in its 4,200 hotel locations that could allow customers to do things such as open their hotel rooms with an Android smartphone app as early as 2015.

Customers can already use the Hilton HHonors app to check in and out of their hotels, but the Wall Street Journal reports that the company is spending $550 million to let people actually unlock their hotel rooms with the app. That feature will begin rolling out in 2015 and be available worldwide in all of Hilton's hotels by 2016.

In addition, Hilton will let customers choose which rooms they want to stay in with their app by the end of summer 2014. The idea is to cut down the line at the check in desk at these hotels, which can get rather lenghty at times.

What do you think of the idea of a smartphone app becoming your hotel room key?

Source: Wall Street Journal