Incidentally if you want to explore non-verbal signalling I really recommend gibberish games from improv. Viv and I use them quite a lot in training (described here). I find that if you get people to practice setting up an activity in gibberish and then in normal language, they create a lot more engagement.
Ben Schott has a go at the paradoxical blandness of supposedly disruptive startups: Welcome to your bland new world. It’s easy to get stuck in