I bet the UK health authorities wished they had a network like Neblio when Wannacry took down their access to patient records recently.
This would seem to remove some of the reason for VPN. Also as a world traveler for work I am writing this from India) i can testify to how torturous it is to work remotely out of a server sitting back in the US. This would distribute the data across the network so it always feels local.
That said do the gremlins of the internet, worms and virus etc migrate into the blockchain networks too?