Marshall amp controlled with smartphone app.
You can choose presets just by tapping on your phone.
Nice!
I'm glad none of my Marshalls had this feature. I'd have to grab an old rotary phone handset and rest it in the modem cradle to change my settings. But seriously, I'd worry about obsolescence with phone app control of hardware. It wasn't too long ago that Blackberry was the smartphone of choice. At least with a computer you can run older stuff on newer hardware and OS. I'm running some PC software from the 90's still on Windows 10.