All the WIFI adapter does is connect the receiver to the internet via your WIFI enabled router and that's it, it (the receiver) can't communicate with any other WIFI enabled device but the router.

To get the program that the receiver is picking up from the satellite out to an HDTV you use the HDMI port via a cable connected directly to the HDTV.

To get that signal from the X2 to any other device you can use a slingbox (or other type device that will do the same thing) and the slingbox will transmit via a LAN connection or WIFI (if it has one) to any WIFI or LAN connected video device, the slingbox (or other device like it) can transmit the program from the X2 to your iPad, cell phone, or other device for viewing video programming, or an HDTV with built in WIFI or WIFI adapter attached to the viewing device.

For more on this type of setup Google the slingbox.