The traditional OS is becoming increasingly irrelevant in these days of virtualisation. I predict that future high-performance systems will be built with unikernels.

It's not a blind-spot, concurrency and parallelism are the core of every CS level operating system course at uni-level. There are mountains of white-papers discussing every aspect you can imagine. It's simply that all existing OS's are simply good enough.

Applications scale, not operating systems.

The problem is now in the application/algorithm level, not the OS level.