Here's how this all goes down:
1) You buy a couple smart bulbs and put them in some lamps you want to automate. Your wife or SO turns the lamp off at the switch, your smart bulb doesn't work anymore since it doesn't have power. You ask her not to use the switch, and use the app instead. Pandemonium ensues.
2) You buy a voice controller (e.g. Alexa or Google Home), so you and your wife or SO don't have to use the app at all and you can control the bulbs by voice, and you quickly realize you want to turn everything on by voice.
3) You buy some smart switches to replace a lot of the switches in your house, and start to look for new ways to control those bulbs, so that your wife/SO/aging parents can use a switch if they want, or they can use voice.
4) You then decide you hate using a remote to change your TV, so you buy a Harmony - which you can also control using the voice controller.
5) Wouldn't it be nice to have a smart thermostat, which kept a schedule and you could ask to turn up or down from bed at night? You start looking into Ecobee or Nest.
It's a slippery slope, @BenAtSense, be careful on that first step. Hue is just one little Lego in the stack, and sometimes it doesn't play so well with the others. If you intend to have just one Lego, that's fine, but if you start to see yourself going through steps 2+, go with something with a lot more integration potential like Wink or SmartThings or Home Assistant to oversee automations, and Alexa or Google to run voice..