True. One thing that comes to mind is lighting. However how many people will spend £50 for a single bulb? [1] Maybe Apple has found a way to make it work. Then again maybe this is just a simple app with an API for developers to hook their stuff into and isn't going to be a 'flagship' feature of iOS 8 (kind of in a similar vein to iOS in the car - cool and useful but irrelevant to most people).

[1] http://store.apple.com/uk/product/HA780ZM/A/philips-hue-conn...