It sounds like marketing hype. The term "hypersonic" is so vague as to be almost meaningless, for example the V2 was technically a hypersonic missile. Can it usefully maneuver at hypersonic speeds? Can it track a target at hypersonic speeds? Without further evidence I'm going to assume the answer is "no".

Also, as the Iranians have recently demonstrated, the way to get get past someone's defences is to deploy multiple warheads (and a pile of random debris) from a cheap missile, not to bet on exotic hypersonic weapons.

> for example the V2 was technically a hypersonic missile.

The V2 was not a hypersonic missile, it was a ballistic missile that had a predetermined flight path that was easy to predict. The distinguishing factor of hypersonic missiles is that they do not require a ballistic trajectory to achieve their speeds (and are hence, much harder to detect) and they maintain maneuverability throughout their entire flight path.

https://www.sipri.org/commentary/topical-backgrounder/2022/m...

> The ancestor of ballistic missiles, Germany’s [...] V-2 was first launched in the 1940s. During ascent, it could reach a speed greater than Mach 5 and could do so again momentarily on its way back down. But, no one would claim that the V-2 was a hypersonic missile. In a similar vein, should one apply this label to modern intercontinental ballistic missiles that reach speeds beyond Mach 20 at ascent and re-entry?

> Certainly not, and there are other characteristics commonly cited when defining ‘hypersonic missiles’. However, while a combination of defining characteristics is increasingly adopted among experts, hypersonic missiles are often not well understood within public discussions in politics and the media [...]. The US-based Missile Defense Advocacy Alliance states that ‘hypersonic weapons refer to weapons that travel faster than Mach 5 (~3800mph) and have the capability to maneuver during the entire flight.’