What about small tablets, anyone using those as a flight computer?

Say the GalaxyTab4. http://www.gsmarena.com/samsung_gala...4_7_0-6251.php

It has GPS. I went into Office Depot and downloaded TopHat / XCSoar on it using the stores wifi and then cut the wifi off and the GPS picked up my position inside the store. The screen seemed to look nice and all functions seem to work. Don't know about direct sunlight though, but could a sunscreen be used for this or any other device. After all the panel is somewhat of a sunscreen to panel instruments.