@Giggsy11 – He’s not really cluttering up the thread, he was correcting you, as a step and a slope are two completely different things.
It is quite clear that the nose is sloped, as it was last year, and I don’t see why they would go with the route of the stepped nose anyway. Many of their cars in the previous years have had lower noses than their rivals, and given that (arguably) they had the fastest car last season and they only need to evolve their previous iteration, it could be foolish to go down a different route, which would no doubt lead to having to change other parts of the aerodynamics.
Personally, I think the changes to the car will be very small, unless they have stumbled across something revolutionary. Probable incremental changes to the exhaust and diffuser areas, as well as front and rear wings (especially the latter due to the DRS being not as advantageous in qualifying this year).
Still, I think there is something to that airbox…though I don’t know how much that could really effect a team’s performance.