I think that would have to be clarified. There’s software, firmware and hardware.
Hardware would obviously be real stuff you can hold in your hand. If they said “hardware”, then that to me would mean an actual chip or module with electronics inside (for a fee). Faster electronics to speed up interface and refresh rates.
Software is technically what’s on top operating your system. Firmware would be the base stuff between your components I believe. That being said it’s common for people and companies to use the term interchangeably. I have to do many software and/or firmware updates to all my digital mixers in my (sound) business. And I find they use those terms to cover both aspects many times with just one word description, usually firmware.
My guess is if they said anything, they mean a firmware upgrade, getting bugs out, or maybe an entirely new system that’s been redesigned for a faster new interface. Don’t know if that would include navigation and/or speed sign recognition software as well perhaps.