I mean, yeah, it's "a lot" because we've been starved for so long, but having run analytics aggregation workloads I now sometimes wonder if 1k or 10k cores with a lot of memory bandwidth could be useful for some ad-hoc queries, or just being able to serve an absurd number of website requests...
CPU on PCIe card seems like it matches with the Intel Xeon Phi... I've wondered if that could boost something like an Erlang mesh cluster...