Why all the fuss about Russia’s newly demonstrated Oreshnik hypersonic missile?

Russian state television yesterday was explaining to its domestic audience how awed Western leaders were by the first use of Russia’s still ‘experimental’ hypersonic intermediate range missile, the Oreshnik (hazelnut tree). They showed on screen the utter confusion of Zelensky over how to respond other than to publicly beg Washington for further shipments of anti-aircraft systems to better protect his homeland. Of course, all of US and Western defenses are useless against the invincible Russian missile.