During the concert in Paradiso, Amsterdam, I couldn't see which equipment they are using. However, on the DVD I recognized the software: they use Apple's Mainstage. It's part of Apple's Logic Studio software (which I also use). Mainstage is an application made to perform on stage. I also noticed that Ultravox uses MIDI master keyboards from Novation and CME. This means that they use software synthesizers. The question I can't answer is: which software synths? Good chance they use digital recreations of synths they used in the 80's (OSCar, ARP or PPG Wave...)