Watch Dogs changed Ubisoft's approach to showing pre-release games - Destructroid (emphasis mine):

According to Guillemot, Ubisoft took the mindset at E3 2015 of "Let's make sure the games are playable, that they’re running on the target machines. When we show something, we ask the team, make sure it’s playable, make sure gamers can immediately see exactly what it is. That's what we learned from the Watch Dogs experience -- if it can't be played on the target machine, it can be a risk."

What a novel idea.