With X, B2, MK8, SSB4WU, and DK all set for 2014, the exclusive lineup seems pretty strong. That's 5 high-end titles. 2013 saw Pikmin3, W101 and will see WWHD, SM3DW and the launch of the new Wii Sports and Fit. Certainly M3DW is shaping up to be an amazing title, but I would say as a whole the 2014 exclusives look stronger and have more broad appeal. That's without anything further announced (ZeldaU?), and without counting DLC and updates to titles like Wii Sports Club.
The only way I see 2014 as being weaker is if 3rd parties drop the support. If games like AC, WD, COD and Batman are gone from the 2014 lineup, 2013 becomes much stronger. I would suspect the opposite, if you see the install base hit upwards of 10 million, you may see titles such as the EA Sports line make an appearance.
