I mostly want less stuff in a laptop. A well-built 12" tablet, except:
- entirely solid state: no fans, mechanical hard disks, optical drives, or other moving parts barring the LCD,
- no touchpad, only trackpoint,
- no camera,
- no fingerprint reader,
- no "trusted computing" hardware,
- no Windows bundled,
- a serious warranty on the LCD: no dead pixels, free replacements if vertical dead lines in X years,
- good battery autonomy,
- decent linux drivers for all hardware available.