I have the idea of a gate that spirally contracts and expands on click of a remote. The idea would be for smaller homes with not a big enough drive way for a traditional metal gate on hinges.
The gate would use some form of RFID, or the likes, controller to receive signals. Simple open and close would be cool.
If the gate could be exposed over the internet, maybe an app or web app could also make use of it. Having an optional slider would be cool for a percentage of how much you want the gate to open. For example, say it takes 15-20 seconds for the gate to open, you might not need full width. So opening it 10% might take 3 seconds, which is all you need.
Sketch shows rough idea. The blue box and line represent a motor and pole running up the middle of the wrapping barrel. It will coil up and the slats on runners to close and open the gate.
I can see the opening of the gate being a challenge, as to unravel the coiled slats might require extra force. Having another motor on the end of the runner could aid in pulling the gate open, instead of relying on the one motor for opening and closing.
Having a manual crank incase of electronic failure would be ideal. Maybe some external flywheel that can be slotted into a capped fitting to allow someone to manually open and close the gate. Not much thought into the mechanics or physics of this idea, might require too much force to open and close from a coil