Smartphone controlled anything never feels great to me. If I have to type in code to unlock my keypad, then wait for an app to launch, just to change the temperature on the thermostat, it's already over. On a similar note, I wanted to love the Chromecast, but I found the phone to be a terrible controller. Now I use a Roku, which has a great remote. Instead of my girlfriend and I crowding ourselves around a tiny smart…
So much wrong with your statement... Unlock with fingerprint. App launches aren't that slow on iPhones :/ How about an extension to do it from the notification center? Or even Siri? Neither requires unlocking. You could technically have an iPhone plugged into a power source and activate Siri with "Hey Siri" and then do your thing. Then.... we have the Watch :)
I mean, I'd still use my smartphone as a remote for other reasons. But the parent does make a good point.