Raspberry Pi Foundation announces a new, small-and-modular form factor

The raspberrypi is great for somethings but will never be competitive for HPC. It takes a lot of raspberrypis to get the performance of a single high end CPU and you add all the extra complexity of communication between nodes. Its only 32bit and has very limited memory per core. It can be useful for learning about some of the issues encounter in real clusters though.

I imagine this will be more useful for embedded projects. Suppose you want to build a quadrocopter or phone or whatever, and need a raspberrypi level CPU. You can make a breakout board with just what you need, rather than carry around a whole pi.