I'd buy the P50s if it only came with
1) A Better IPS display with no noticeable PWM flickering on any brightness level, at least 100% sRGB and at least 250 nits max brightness
2) An Option for quadro M1000M and M2000M graphics
3) At least one thunderbolt port
and finally,
4) Sturdier chassis (because yes lenovo, we know you're only shooting yourself)
A real shame since I used to like thinkpads when they were less materialistic and more practical. Now they've chopped themselves into multiple cheap machines that only come with one distinct advantage. Well guess what lenovo, when it comes to laptops, I want the jack of all trades. And by that, I mean I want a great display, keyboard, speakers, I/O, battery life, chassis, design, ergonomics, performance, power, form factor, portable weight, serviceability, stability and reliability all in one.
Guess I'm going with either Dell (Latitude 15 5000 e5570, Precision 15 7000 m7510, XPS 15 9550) or Apple (Macbook Pro 15 retina) this year.