The 6502 can do wireframe and pseudo-3D. 3D has a lot of different types and levels, but prior to this there already wireframe and pseudo-3D products out there.

NESGlider was a wireframe demo. Of course very impressive technically but just a tech demo. The 6502 chip spent almost 100% of its processing power just calculating the 3D lines, leaving very little room for smooth gameplay or filled-in polygons.