Over the past few months we have actually been using a Raspberry Pi with Wifi to display the remote URL for song lyrics.
It seems to be working great.
<br>
I set up the Pi's (we have two) something like this http://elinux.org/RPi_Tutorials#Create_an_information_kiosk with wifi dongles and a delay on start up before the browser opens full screen (to give time for the wireless network to connect).
Obviously the browser is set to full screen and the 'home' page is the OpenLP IP address for the stage view.
<br>
Darren.