Patch 1.5 will introduce the store and some new content.
New Daily area (6 missions and the heroic 4-man one is fantastic imo)
HK questline
New world boss (nice mechanic on the bugger, each time you kill it you get new codex/loot as the boss gets stronger, stacks to 5).
EC Nightmare mode raid (my guild has been waiting for this for a long time).