Unlocking my front door? That has to work without internet access.
Turning my lights on and off? That has to work without internet access.
Logging my heart rate et all, ala fitbit? Nope, I should be able to use a server of my choosing, requiring that I use cloud servers for something I paid a one time fee for is an instant deal breaker.
A service that logged all of my access times and determined whether or not I was home based on the result? I would prefer that be run from my own server even optionally with a DNS hijack, but I would understand the need for the cloud in this situation.