The bigger E7 scratch the 200 W mark pretty hard and IBM already had POWER chips go beyond 200 W. However, cooling and power density are ... problematic. The same goes for accelerators. Supermicro will happily deliver you a 1U box with four pascals and two Xeon sockets, but there is no datacenter in the world were you can stuff 42 of those in a cabinet. [Which doesn't mean that these don't make sense]
However, high end systems don't lend themselves well to mass-deployment (i.e. scale out).
However, high end systems don't lend themselves well to mass-deployment (i.e. scale out).