I believe that if you can imagine the design or function, it likely can be done. That does not mean that just because it's possible that it should be done.
The picture I have when reading the requirements tells me it's both possible and practical, as you might see many variations of gui forms if you take notice whenever you go to places like the dentist, doctor, store, restaurant, etc.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.