Mirror Mirror makes it easy and cheap to make a smart mirror.

If you have an old Android phone or tablet sitting around collecting dust install Mirror Mirror on it mount it behind a picture frame with mirror-film on it and hang it on the wall for a beautiful and functional mirror.

As of right now the mirror includes:
Date/Time
Weather (Currently & Forecast - provided by darksky.net)
Agenda based off device Google account
News headlines from source of your choice.

More widgets are coming soon as well as Amazon Echo/Alexa and Google Home integration so you can control the mirror with your voice.