Yes! And no... There is wifi on the bus but mobile wireless technology is still built off of 4G satellites with limited bandwidth. We ask that you do not use the wifi to stream movies or download large files because it will clog up the service for the other passengers. This is the same service that is provided on all modern bus companies. The future is now... kind of.
Note: Central PA has a lot of 4G dead zones where the wifi will not work. The safe thing to do is download a couple movies and some music before the trip.