Click to enlarge. Here we can see the evolution of Iron Man's armour throughout the series, all the way up to the Mark VII armour used in the finale of The Avengers. Marvel is never one to leave something be (especially when merchandising is to be considered), so expect an extra cabinet to be installed before the end of Iron Man's latest adventure.
It's a nice image, a good way to remind fans of what has come before and (if we over-analyse the clutter on his workbench in the foreground) hints of what is yet to come.
Expect an overkill of Iron Man 3 information between now and the 3rd of May 2013.