I realise that I'm probably talking to a biased crowd here, but is it still worth picking up a Wii U this late in the game? It's the only major console I've ever skipped.
What are the exclusives that are worth buying a console for? Sell me on it!
Why wouldn't it worth it now? It's worth it now more than ever because you get a boatload of top quality games right out the gate.
Nintendo Land
ZombiU
New Super Mario Bros. U/New Super Luigi U (the latter is available as DLC but there is also a rare disc version as well as a console bundle with both on disc)
Super Mario 3D World
Mario Kart 8
Super Smash Bros. for Wii U
The Wind Waker HD
Bayonetta + Bayonetta 2
The Wonderful 101
Deus Ex Human Revolution Director's Cut (multiplat but best on and designed for Wii U)
Donkey Kong Country Tropical Freeze
Captain Toad Treasure Tracker
Pikmn 3
Kirby & the Rainbow Curse (Rainbow Paintbrush if you're in PAL land)
Hyrule Warriors
Affordable Space Adventures
Earthbound (quasi-exclusive, given the rarity and price of the original)
NES Remix 1+2
Stealth Inc 2: A Game of Clones (former exclusive, designed for Wii U with exclusive co-op mode)
Metroid Prime Trilogy (the only reasonably priced choice these days if you're cool with a digital copy)
Out soon:
Splatoon
Yoshi's Woolly World
Mario Maker
Xenoblace Chronicles X
Star Fox
Devil's Third
Fatal Frame V
On the horizon:
New Zelda
Shin Megami Tensei x Fire Emblem
+more unannounced stuff
+ there's a ton of eShop games, some of which will be exclusives. don't have the list handy right now.