Hi @hellBENder !
Very happy to answer your questions. They are spot on!
1.Yes, pen is docked magnetically to the device
2.Surface pro 4 has one of the best in class displays but not under sunlight and during tests. Surface Pro 4 has reflections of.5.6% while our device is 2.5-3% reflections(source http://www.displaymate.com/Surface_Pro4_ShootOut_1.htm) . Our screen is very similar to IPad Pro when you actually look at it as reflections are minimal.
3.During our next testing round we will definitely try a test like that. Now it is a bit hard to say:) but I would say around 8 hours. We will do some more testing and let you know our PC Mark 8 home result is 5 hours 30 minutes while Surfaces is 3 hours 15 minutes (my source http://www.techradar.com/reviews/pc-mac/tablets/microsoft-surface-pro-4-1290285/review/3)
Also thanks to our focus on eliminating reflections you can use your device with less brightness while achieving same visual performance of the display as less reflections mean less backlogs power needed to bring colors to live
4.It would be best of you give example of such old stuff But generally there should be no issues as our device is Thunderbolt 3 certified meaning it supports all of its feature set and other Thunderbolt certified devices. We ve been lucky as Intel has been helping us with their engineering resources to implement Thunderbolt in our device.
5.Our display is very power efficient as it uses IGZO technology. You can read more about IGZO here http://www.sharp-world.com/igzo/sp/index.html
And as said before because of anti reflection coating you need less brightness to achieve same picture quality on your display
6.We are now discussing with various vendors Eve eGPU and other docking station solutions Only thing I can say is that the more successful the project is and the more great community members like you:) we have the more possibilities we have!