So instead of getting a laptop for field mocap, I figured might as well I get a mini-PC.

Looking into this one: http://www.newegg.com/Product/Product.a ... 6856164009

However, I am wondering if I will be able to use 4-8 PS Eyes / 2 Kinects with USB 3.0 ports, and if there are enough of USB ports, and if on-board GPU is powerful enough to process mocap video?

Thanks.

I think it is not suitable choice for using with our software.
No internal storage - you need to use external drive which consumes additional USB bandwidth.
There are 4 USB 3.0 ports, but they all may (and I suppose do) belong to a single controller.
GPU is a low-end with poor performance.