Manufacturers are getting away from including TVs. Generally they are no different from a household TV and the manufacturer doesn't want to deal with warranty issues. Flatscreen TVs are dirt cheap anyway.
Prewired likely means there is a connection to the antenna/cable and power near the TV location. On ours, there is also a connection to the stereo system so we can runs sound thru it.
If you really want to know for sure, call up the dealer and check.
Tammy & Mike
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV