Er, no, thats really incredibly simplistic. For a start the Eldar are not particularly oriental, Jes Goodwin has said so himself. They take some inspiration from the Orient, but much more from a huge swathe of Old World cultures. The Praetorian IG are Victorian, not 20th century, the Vostroyans are really more 19th cenrury Russian than 20th etcetera etcetera. Necrons have as much in common with Egypt as Orks do, they aren't Tomb Kings.