What will the next development be?

I'm not sure if this has been covered before, apologies if it has. We now have caravans with 12v, 240v, hot water,cassette toilets, central heating, showers, microwaves, fixed beds,  plus sites with laundrys hardstandings and serviced pitches. None of the above were there at the outset of the caravan as a concept. What do you think the next innovation will be ?