Yeah, it's a bit of a bummer... sure 1/20 of an inch thinner, but nearly a quarter inch wider and nearly that much deeper, and .1 lb heavier (CNet is wrong on the weight, I know Apple previously listed it at 5.4 lbs).
Will have to manhandle one at my local Apple store but based on specs this seems like it's going to be a perceptibly bulkier machine.