I think the important part is the "spooky factor" of "this highly maneuverable space plane can stay on orbit for two years doing who knows what".
The implication is that the US military has a vehicle that can stay on orbit for as long as they want and move around to do anything from deploying secret satellites to spying to disabling enemy spacecraft without anyone else necessarily knowing what happened.
The implication is that the US military has a vehicle that can stay on orbit for as long as they want and move around to do anything from deploying secret satellites to spying to disabling enemy spacecraft without anyone else necessarily knowing what happened.