Well, it forced Putin's hand, showed his cards.
I'm sure the US is holding on to some crazy mil tech they've yet to unleash.
The hypersonic missiles were known to exist, but unknown if they were functional. Now they know.
How many do they have, though?
Russia thinks the missiles are invincible. Mach11 is damn fast.
Living fairly close to a couple US mil research bases, though, I know there are things already in the skies that make no sense in how they operate, but definitely exist.