Sounds nice in theory, in reality less than 1% of applications really need to scale and only one "resource" a.k.a. "server" is going to have to do all the work,

Sounds nice in theory, in reality less than 1% of applications really need to scale and only one "resource" a.k.a. "server" is going to have to do all the work, simply for economic reasons. Current (shared) PaaS offerings still have too many limitations and lock-in to be a suitable replacement.