Text to Speech Functionality

Actually, this kind of functionality is very common these days, and indeed it also has been used widely.  It can be used for security purposes, or for easy navigation, etc.

Lockitron: Keyless Entry using your Phone

Yes, as what the title and also their tagline says, Keyless entry using your phone. Lockitron released a cellphone-controlled system, so you can simply lock or unlock your door anywhere just using your smartphone. Though it’s not limited only for smartphone users, it is also compatible to older phones as well through simple text message commands, thus making it friendlier.