I am consistently pleasantly surprised by the way Apple consistently updates Logic with only more and more layers of impressive features. ARA2 support was fantastic - so was their buyout of Camel's Alchemy.
Alchemy alone added a ton of value to Logic, and it came as a .x upgrade. Fantastic.
EDIT: One of the only selling points of an iPad I can think of is using it on a stand with Logic Remote as an actual digital mixing window. The experience is unparalleled.