Have you folks considered partnerships with Synology, QNAP, etc? Syno have just embraced Docker in their latest OS version, although that is limited to their Intel-based NAS range. Sandstorm might have an opportunity to provide a platform for lower-end and high-end NAS to run web applications.
We are exploring this direction but don't have anything firm yet. We don't aim to enter the hardware business ourselves so we're happy to partner with anyone building hardware. :)
Sandstorm is limited to x86_64 for probably the same reason Docker is -- our app packages contain binaries and we don't want to burden developers with supporting multiple architectures, at least for now.
I'm biased, obviously, but Docker on Synology strikes me as an odd fit. Docker is optimized for massive SaaS-scale deployments of stateless servers, not so much one-off small-scale stateful app deployments.
But I'm sure you have considered this already :-)