About the only reason I could think of to buy smart lightbulbs would be to suddenly turn all the lights in the house red, and yell "torpedoes in the water, brace for impact!" and that doesn't seem like a strong enough argument. I'd probably only do this 2-3 times a month anyway.
They become rapidly less useful when the toddler learns to say "hey Google" and decides to make all lights green all the time.