new DE models in march wouldnt mean that I'd spend less money on O&G (as in zero anyways not playing fantasy) and instead would mean GW would earn a few hundred bucks more in march.
with the time it takes to assemble, paint and have fun with an army I cannot see much people really go out and buy a new army that frequently anyways (as in: if you bought DE wave 1 you will still be into DE and not anything fantasy related!).