Despite few rule changes, 2007 provided a major technical challenge for the teams. For once aerodynamics were largely unchanged, as were the engines - albeit restricted in development.
Thus, the season was largely directed by the teams' reaction to the new Bridgestone tyres. The tyres demanded different weight distribution, and also affected the aerodynamics.
Thus, the order of teams established over the past few years was upset, leading to several outfits having to go back to the drawing board in terms of understanding how their cars worked.
Visually, the cars gradually started to adopt similar solutions, with pod wings on the sidepods and extra elements over the front wings. There was also controversy regarding how teams used their rear wings and floors for aerodynamic effect. In many respects, the year had a lot of technical interest, but it was much more in the detail rather than major visual changes.