Look into TouchControl. Pair it with Global Caché devices to control IR and RS-232 devices. IP control is native. Mostly the limit is your own creativity. You may be able to reuse bits and pieces of your ProntoScript. That said, programming TouchControl is fundamentally different from programming Pronto. My screens and interactions look similar to how I designed Pronto screens, but under the hood is different.

iPads and iPhones are much faster than Pronto and have better WiFi. Interactions that were not practical with the slow Pronto are now possible.