As everyone, I suppose you have seen iPad videos, at least you heard about it :
I suppose you have complained about its closed platform, its single-task os, or may be its tendentious commercial name. However with such a device (a tablet), you think your GEF based editor could benefit from sketch capabilities ? Indeed that something Ugo Sangiorgi did :
The good news is that it will probably be contributed to Eclipse.org. If you are interested, have a look to this new project proposal.