Yes they have. Hardware sales increased in all territories with the release of Pikmin 3 and you'll see the same thing happening with The Wonderful 101, Wii Play U, Wind Waker HD, Donkey Kong, Super Mario 3D World and Wii Fit U.
Software sells hardware at the end of the day. We saw this when the Wii U had a sales bump in March with the releases of Monster Hunter 3 Ultimate and Lego City Undercover.
You'd be a fool to think that the releases of those titles I've listed above, alongside the likes of Rayman Legends, CoD Ghosts, Assassin's Creed IV, Watch Dogs, Sonic Lost World and Mario and Sonic At The Olympics won't have a positive effect on hardware sales even before you start to take the $50 price cut into consideration.
The Wii U is going to have an installed userbase over 8m before the end of the year imo, the PS4 and One will both be under 2m and hopefully all this talk of the Wii U being 'd00med' will stop.
You think the wiiU is going to sell over a million units a month on average til the end of the year to hit 8million? In the face of two huge competitors, their own new handheld and against current gen competition?
Do people think through before they post?