The Wii U has been getting great software, so why can't the PS4/Xbone? Just disappointment after disappointment. Though Bloodborne is out soon.
I think the volatility of the industry and the fact that so many development studios closed during and after the PS360Wii era has prevented any future generations of hardware from receiving the game library that, say, the PS2 had. The PS2 has literally every genre on the planet represented and most of the top representations of each genre as well. Smaller game studios could release niche titles and find success, or even release them at all, because the PS2 was easy to work with and build from and many publishers at the time were willing to take risks.
You don't have that much anymore, because every game is AAA and takes an Order 1886 amount of time to beat.