I was at the Festival of Speed hosting a client and both of us being slightly nerdy, we spent quite a lot of time in the Future Lab.
This foiling speedboat above, which looks like it came from Satar wars is powered by a very large electric outboard.
I didn't catch up on the specs or purpose of this, but clearly a wind and solar autonimous vessel. IBM also had their Mayflower Project there, and earlier I'd had the opportunity to talk to the senior AI engineer about granulatity of collision avoidance and shared some of my own somewhat scarry offshore experiences.
Some interesting submersibles using remarkable AI control systems to maintain incredably stable position which enables them to perform amazingly accurate work with robotic arms.
There were probably some cars at the event as well.