I'm going to be updating. And have the obnoxious achievements start all over on me again. I somehow don't want them to go away though
Things will be possible in 1.3:
(The ratings are my opinion)
Stackable signs (5/5)
Dispensable lava and water; loopholes ahoy (4/5)
Cloud computing Ender Chests (4/5)
Books you can write (4.5/5)
Tripwires (4.5/5)
Exp revamps (5/5)
Harder creepers (2/5)
Cocoa bean farming (4/5)
Awkward pistons (2/5)
Smoother boats (5/5)
This isn't everything for 1.3 though. It's just a few things to keep in mind.