This feels like IBM/RedHat are playing the "me too" game with Kata or Firecracker. Or maybe, at a higher level, IBM needs something in this space to compete with what AWS has in their Nitro architecture. But, as you say, I'm not sure that "unikernel" means anything specifically at this point other than to, maybe, generate buzz. I don't understand these fluff pieces that sound interesting but are currently vaporware.