If they do a ground war tabletop, it has to be 15mm scale. If it is bigger, you can't accomodate vehicles, if you make it smaller, the all important Jedis will be hardly recognizable.
If GW can do titans in 28mm, FFG can do AT-ATs in 28mm.
You can make them, but they can't maneuver on a normal size table. May be not a problem with AT-AT as they hardly move at all, but think about AT-STs, let alone jetbikes.
Well I wouldn't say that 60km/h is "hardly move at all" ^^


