Honestly, I don't think there is much else to see from the demo is there? Sounds we already have an idea as Jordan explained. Physics seems good. Smoke is good. Driving animation is better. HUD looks good as well. Suspension improvements seems evident. Interior lighting looks improved too. Silverstone looks great. We saw some tidbits of the new interface. So, what else are we looking for?
Other than that, just cars that we've never seen before like the Alfa Romeo or Countach interior, but I don't mind waiting 6 months to experience them myself, or even possibly the demo in July, that is if we don't only get Nissans.