From what I recall (correct me if I'm wrong)
Vehicles:
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-m3 troop carrier
-panzer IV - top mg, cannon recoil (tank rocks when firing), visibile moving turret
Planes:
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-a6m5b(zero), yak9, fw190a5 (see screenshots)
Special Effects:
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-smoke/fire for destroyed buildings, smoke
is supposed to be quite impressive
-special explosion graphics for planes
-sun glare (just read this, hopefully in)
-more objects for hiding tanks in? (rumour)
-new/better clouds (clouds look different in screenshots)
Misc:
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-mission Planner *drooool*
-terrain editor (probably after 1.03)
-hispanos going to be fixed (rumour)
That's all I can think of right now.