Hackers in my local community have already upgraded X230's screen to up to
2560*1440. Even higher resolutions (e.g. 3840*2160, a.k.a. 4k screen) are
theoretically possible. The cost is the express card slot.
As for touch screens, I have found a way to globally disable the touching but
not to affect the digitizer pen. i.e., you can still use the pen as usual and
you'll not be annoyed by accidental touching. This is extremely useful if you
use your tablet to take notes or draw pictures.
I have several "multi-touch" devices without Boot Guard, including ThinkPad
Yoga, ThinkPad Helix and X230t. I also have several Wacom boards.