Just as desktops replaced computers that used to fill an entire room, and laptops, tablets, and smartphones have pushed desktops aside, single-board computers are now in a position where they can take over tasks from other devices.
And they're cheap.
Orange Pi has a new single-board quad-core 64-bit computer capable of running Android 4.4, Ubuntu, Debian, Banana Pi, and Raspberry Pi images called the Orange Pi PC 2.
A dozen, faster, better or cheaper alternatives to the Raspberry Pi
Here are the specs:
Quad-core 64-bit Cortex-A53
High-performance hexa-core Mali450 GPU
HDMI with support for HDCP
Three USB 2.0 ports, one USB 2.0 OTG
What you can get this board to do is pretty much only limited by your imagination. Turn it into a tiny computer, or a wireless router, or a wireless speaker, or even a remote weather station.