It costs as much as a high-end tablet PC (AU$3,890) but the 21.3" Wacom Cintiq is one heck of an LCD screen that also has on-screen pen input capabilities:
Of course, that model is designed specifically for creative uses. I'd probably end up getting the 17" PC-720 instead (AU$2,195):
Or, at the very least, the 15" DTI-520 (AU$1,760):
Or maybe I'd compromise and get the 20" wide screen Cintiq 20WSX (US$1,999), though that's not available in Australia yet:
Ah, choices, choices.
Of course, all this has to wait till I've made my millions.