User blog comment:LS11sVaultBoy/GTA Series Not Continuing?/@comment-6680085-20140220063519/@comment-4793760-20140221122515

Do you even know what HD and 4D means? HD is High Definition, aka high quality of faces, doors, animals, etc.

4D is Fourth Dimension, which is not possible to see for humans, as our world as we perceive it is 3D.