Google has been rolling out some updates this week. Yesterday I got the new look Reader and also decided to follow the link in the bottom right of my Gmail screen to opt in early to that update, too.
I am not yet won over by the new Reader interface, which seems a bit spread out and also to be running a bit slower than it was before. However, I am impressed with the update to Gmail; one of the features they could do with transferring across are the links that let you alter the display to adjust how the contents are spread out or bunched up (compact works well for me).
Both will need a few days further use though to give a full evaluation.