It's an interesting (read: niche) market, to be sure. It's the same market as someone who might buy 8 raspberry pi boards, or 4 ODroid U2 machines for the purpose of learning about parallel computation.

The Epipchany chip (the coprocessor on these boards) is supported as of GCC 4.8, so we also may see some novel ways to offload work to this chip in the future.