Using Blackmagic UltraStudio HD Mini

My current setup for graphic performance is 6U portable rack with 3U rackmount chassis PC and some peripheral equipment. I use 4K Extreme (PCI card). This setup is working well, but it weights a lot!!!
1) I plan to use UltraStudio HD mini - at Blackmagic Design is written that it has a simultaneos fill & key playback. Has any one tested this device?
2) to be able to use this device i need a notebook with thunderbolt 3.
What about this - DELL XPS 15, 15.6", Intel Core i5 6300HQ, 2.3ГГц, 8Gb RAM, nVidia GeForce GTX 960M - 2048 Mb?
Basicaly, i'm use flash templates and sometimes - full-screen bacground - is that notebook is good enough for my purpose?
Thank you!!!