And I totally agree with him. I didn't have myself my first phone until I was 14 years old (with some exceptions, like when going on school trips), and I can't thanks my parents enough for this.
I agree that smartphones can be really useful. You have infinite knowledge in your hand when you have a smartphone and a connection to internet.
But, you can also start depending on it. I know several people that can't leave their smartphones alone for more than 5 minutes, even when involved in social events. And it's not to access knowledge, it's either to chat with someone else, or check the latest "meme" over facebook.
Yes, it's "having fun", but when you're not able to live the moment, and have to access Facebook/Whatsapp every 5 minutes, it's called dependence.
Hopefully, Louis's child will not get into it. Thanks to their dad, they'll learn to enjoy real life, to enjoy the moment. And when they'll get their first smartphone, they'll be to busy enjoying their live to use it everytime.