Well, coming out with two new models, rather than a new model that's an incremental update of last year's model and a "discount" model that's a repackaging of last year's model in a different case, is a lot different.
Also that Apple is venturing into the phablet segment, which may bring some who left for Android due to size back and keep some who were thinking about leaving in the Apple fold. So its important in that way. It will also be interesting to see what the sales mix between the two sizes is, and see what it does to sales of the iPad Mini.
It isn't Earth shattering by any means, but it is a lot bigger than what they introduced last year.