Is this similar to what FlyIO is doing? Running containers as microVMs?

Perhaps in spirit? But I don't think you can term LXC a microVM, and I doubt they start close to as fast as Firecracker or smolbsd, and similar ilk. EDIT - appears I am probably wrong about firecracker being faster than LXC as LXC is kernel based virtualization and likely has faster startup than microVMs?