Can only get Widi 1366x768 Resolution. Why?

I have a Lenovo Y50 laptop and an actiontec ScreenBeamPro WIDI adapter.  Why am I getting such poor resolution on my Panasonic 65" GT50 T.V.?

Y50:

Lenovo Y50 Laptop | 15.6" High-Performance Gaming Notebook PC | Lenovo (US)

ScreenBeamPro:

ScreenBeam Pro Wireless Display Receiver - SBWD100A

I installed the latest firmware.

Panasonic is a native 1080P display.