Just because you can change it does not mean that it displayed it.
For example you can take a dvd that was recored at 760 and UPCONVERT it to 1080, But you must have the circuitry to convert it (PS it's still not true 1080, the circuit makes a "Best" quess at what the missing fram would look like.
So if a TV broadcast is sent as 1080i, you would have to have circuitry to convert 1080i to 1080P.