After the Dropcam fiasco, I wondered if there would be a market for secure smart devices with an open API. To me, it's an obvious benefit and one that I would buy (whereas I won't buy the cloud-based devices of this sort), but I suspect the ease of use of something like Dropcam trumps all of the other considerations. I even considered doing a Kickstarter to build something in that space; the technical side, both hardware and software, is actually very, very, simple these days. I mean, a thermostat is a temperature sensor, a clock, and some switches; the kind of thing electronics nerds put together when first learning. The smallest Arduino could more than handle the task (for the prototype, and a dedicated device could be manufactured in quantity very cheaply). Controlling switches and sensors in software is also very simple. Making a beautiful UI (which I think is a big part of the appeal of Nest, Dropcam, and the like) is more challenging, for me, but perhaps there's a UI/UX designer out there who has similar inclinations.
I never thought I'd want to be in the home automation business, or the web cam business, but this kind of thing is just so offensive to me, that whenever I think about it, I want to do something.