I don't get these WiFi light bulbs. Just get cheapo LED's from Home Depot or Costco and who cares if you leave it on by accident during the day.
These aren't Wi-Fi; they're ZigBee. (Not being nitpicky, as there is actually a difference besides that; ZigBee can form a mesh network to effectively extend the range of the "bridge," and the power consumption on standby is much lower than Wi-Fi to such an extent that you can have battery-powered ZigBee devices that last for a year or more.)
Ignoring that point, if all you want is to turn your lights on and off, this is probably not the product for you, though it works just fine for that (as would a "smart switch," though bulbs are much easier to "install"). However, I don't think that's the selling point for Hue. As the name suggests, Hue can change to different colors (really not all that useful for me) but also to different white color
temperatures, so you can use a warm/yellow-ish white when you are trying to relax but change it to a more blue-ish white when you're trying to work, all using the same bulbs/lights. (Exact capabilities depend on the bulb, but all can do the latter except the fixed-color Hue White.) You can also dim without needing a fixture or switch that supports dimming--and you can use Alexa/Google/etc. or Siri to do it for you if you want.
Beyond that, you can also use it as part of automations--for example, when you come home, turn on your front/back door light automatically (with either geofencing or a motion detector)--saves me some trouble when my hands are full of groceries and I can't see which way I'm supposed to put my key in the locks. You can also use Siri (HomeKit) or any supported app/device to turn on or off any bulb/light from anywhere, which can be nice if you want to see what you're doing as you crawl into bed and
then turn the lights off. If you're on vacation, you can also randomly turn lights on/off to make it appear like the home is occupied. (Just a few examples. The possibilities are endless--including, yes, automatically [or manually from afar, for that matter--turning lights off when you leave a room. Less than half a watt is better than 10-ish watts.
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In any case, for the three people who use HomeKit, adding HomeKit support for these additional Hue devices seems like a good idea.
Personally, I'm going to stick to SmartThings (which I unofficially integrate with HomeKit via HomeBridge, mostly for fun and the ability to use Siri; HomeKit doesn't seem versatile enough for what I want).
