The T100 was primarily for my wife so she doesn't hog my PC. Putting SU on it was for when we travel and then I can keep my brain and fingers active.
Can't do SU on my Blackberry phone.
As for the T100 small screen, well, my PC is a dual screen (24in primary, 19in secondary).
I keep most dialogs (materials, components and layers) active on #2 and only toolbars and Entity Info on #1. That gives me a huge work area.
Dual screens also allow me to keep an Excel spreadsheet open on #2 when I am doing calculations and other stuff. Sorta gotten used to that so a postcard screen was a shock. I knew it would be small, but did not expect that to be so intrusive on using SU effectively, till I tried it.
I also have a USB 4 port hub attached to the single USB3 port on the T100. To that hub I attach a tiny USB mouse and my USB Thumbdrive for PC <-> T100 files transfer.
The T100 also has a micro HDMI port, which I have yet to try.