I can't think of any specific examples (perhaps an embedded system that needs to perform a pile of cryptographic operations?) but its ability to do a significant amount of processing on the 2W power footprint it is in a different class to current desktop CPUs and GPUs. Even if this $99 unit only does 1/8 of what a $99 GPU can do (caveat: I pulled that "1/8" figure from my arse) it'll be doing it on 1/60 of the power (based on GPU reviews where people have tried to compare power draw with GPU idle to power draw with GPU at 100% but everything else as idle as possible, which indicate modern GPUs pull between 120 and 150W (http://www.guru3d.com/articles_pages/radeon_hd_6850_6870_rev... is the first such analysis Google found)). That potential computation-per-watt (or computation-per-energy-$ if the cost is more important than the energy supply+dissipation problem) of units like this could be very useful. Of course where power input and heat dissipation are not massive concerns, current GPUs still win on computation-per-device and computation-per-hardware-$.