Will US military use secret spaceplanes,aircrats,weapons against NK if war happens?

If the SR-71 was flying around unknown about in the mid 60's, the F-117 in the late 70's and the B-2 in the mid 80's... what the hell was flying around "dark" in the 90's and over the last decade

There was an episode of Wings on tv many years ago about the commanche helicopter and right at the very end of the show they were interviewing a general about what the future held for the commanche and he basically said somethings along the lines of "it'll be the last of the current type of weapons platform, in the future we'll be moving onto more exotic things, for instance anti-gravity..." - ending with a grin.

im dreaming but i wanna see 'Terminators' or some kind of War robot ,...cool

Some sort of orbital bombardment platform would be pretty cool. The "rods from god' concept seems plausible.