Since I play as Chaos marines and Chaos daemons, this is going to be an expensive time for me, even if I just get codexes and the new units! With Eldar and Dark angels on the horizon as well I can see me becoming poor!
From a screengrab I saw, screamers have been made considerably better, since their meltabomb style attack, while worse is actually of some use in hand to hand vs other things and is ap2! I wont be buying any plastic flamers, I have 6 painted metal ones, and a bunch more in bits, and another box still sealed in metal as well.
I am hoping beyond hope they give daemons something to help them compete against grey knights.