What about Security, Video Surveillance, Irrigation, Pool Control, Weather Forecast/Climate sensors, Remote Access via the Web, Mobile Access, and Energy/Utility Monitoring? You could also add evaluation/ratings of how easy to setup/integrate, how reliable, how good the support is, and if there is open support for DIYers.
For the "features" for the controllers, there are several you have listed as Y, but these require additional 3rd party hardware or software. You should note that for everything - like you do in some cases.
Also, your initial post mentioned that you want this to be useful to a newbie or someone who does not understand hardware/integration. The specs have no mapping to capabilities that would make sense to this person. You need to approach this with a list of use cases, and parameters of those use cases. For example "Listen to audio around the house", the parameters may be how they want to control it, the number of rooms, and the number of simultaneous sources, the types of sources, whether they want to be able to see information about what they are listening to, and if they want the audio to be tied to an event or rule. The company that is successful approaching things like this is the company that will have a broader market appeal, and the company that will ultimately be more successful. While I don't like C4's model (as an expert user), I think it is one of the better models for the mass market with the $ to spend. Just my .02