SPARC dumped in high-RISC maneuver. Fujitsu to use ARM in Next Supercomputer

The mobile ecosystem continues to eat the world as evidenced by the latest super computing conference in Frankfurt. According to the register and other sources Fujitsu will be using a 64bit ARM chip in its Post-K high performance computer in Japan.

Could this be the death knell for SPARC? When one of the two only proponents dumps it in their most high profile system it doesn't look good.