Now using your smartphone you can control devices in your home using just your voice. Here is an example of me using it to open my office door using google now on an android handset.

To do this I am using a variety of apps, hardware, and software. On the phone I am using a rooted Nexus 5 with Xposed Framework, and the Google Search API module for Autovoice to trigger Tasker Tasks.  Tasker triggers an event in my home automation server Homeseer which triggers my Insteon IOlinc to open my door strike.