I have not encountered a tablet with all those characteristics (not that I am familiar with all tablets, I just haven't seen one quite like that).
Processor that can keep up with say the Macbook Pros - tablet processors are good, but not quite at that league
Good Descrete Graphics - not in a tablet; tablet GPUs are good at doing tablet things, not laptop things; also power issues with a high-end graphics adaptor
Matte Screen (I guess this could be fixed with film) - film might reduce the touch sensitivity of a tablet
Can completely act like a legitimate Computer - running what OS? Windows?!?
Have USB 3.0 Ports - maybe
SD Card Reader (Not that big of a deal if its got a couple USB 3.0s - probably; I think some Android tablets have this already
HDMI - most tablets support this, it seems to be the new video standard
Headphone/Microphone Jack - most, if not all, tablets have a headphone jack, not sure if any have a microphone jack
GbE Lan - good luck!