IoT terrifies me and I'd never buy one of these internet-connected gizmos but let me play devil's advocate: you could be coming home from work and, as you know you're about 6 or 7 minutes away, you instruct the machine to make a cup of coffee so that it has time to cool, and maybe you also turn the AC on, etc. It's the exact fantasy being sold to people who buy them and it does, in a way, save time.

Although, personally, I'd question anyone buying these, much less taking out their phone while they're driving to tell a "smart" coffee maker to brew a cup.