I'll be curious what the noise level will be like. It's a neat idea but I really have no faith in Seagate hard drive reliability. I would have liked to see multiple actuators in opposite ends on the same platters to improve random seek times.
(a) This is the return of the undead. Seagate were building 2HP drives back in ... oh ... must have been the mid 1990s.
(b) But what is the point? It's not as if you don't use SSDs when performance matters.
(c) The Tom's article looked quite interesting, but the website was so appallingly designed that I stopped reading and gave up. I mean, that shitehole is seriously bad.
I could see this implementation as a way to manage/mitigate increasing seek times as the number of platters increases thereby causing the size of the actuator to increase in size. We didn't have helium drives back in the day so now with that as an option, a stupidly-large platter count could be more feasible.