Presumably if VDO/Siemens write the required code for the 3D view, then I suppose anything is possible, but I don't believe there is sufficient processing power in the Mk3 Navicomp - compare the speed of map writes between the Mk3 and Mk4 and the Mk4 has a much faster refresh rate.

I don't think there has been a Mk3 firmware update for quite a while as the Mk3 is probably considered 'end of life'. The Mk4 will go the same way in the next couple of years - just hope the bugs in V28 are fixed before then!