"Wii U has been a huge disappointment for Nintendo. And although the company's boss Satoru Iwata has been talking up post-Mario Kart 8 sales, it continues to lag behind expectations.
Nintendo is the most venerable name in gaming and yet Wii U has not sold nearly as many units as the company hoped, planned and budgeted. It points to percentage increases in sales for the April-September period, but the actual hard numbers of consoles sold remains sluggish. As a result, Nintendo's future in the console business looks murky."