From now on, whenever you are finishing a part of a bigger achievement, you'll get a nice popup notifying you about your progress. You don't have to always track your achievements and always view the achievements window to check those little green check marks...
The Spellbook was changed a lot. Now you always will have those four tabs: one for your basic abilities, one for your current spec spells and the other two, inactive, where you can check the spells you could have if you respec or switch specs.
If you look below, you'll see a few more tabs too. The Core Abilities consists in the abilities you will use for sure (some kind of mandatory abilities) if you are using X spec.
The last tab, the What has changed? one, has a few lines with the class changes. There you'll find the changes that affect your class after each expansion and, maybe, each patch.
Companions and Mounts
We already spoke a little bit about these changes, especially about the companion pets, when we spoke about the Pet Battle System and Pet Journal.
Now, we have account wide mounts and pets, and it's normal to have a new interface for both. There is also a button for this new UI in the mini menu.
Dungeon Journal Upgrade
The dungeon journal was finally upgraded and it contains all the old dungeons from all the old expansions. The old raids are still missing, but I'm sure Blizzard will add them before the release of MoP.
Dungeon Queue UI
The dungeon queue window, the one it pops up when you can enter a dungeon, was upgraded a little bit. I expect to see this changes for Raids queue popup too. The a look at the image above to see how it looks now.
New popularity/reputation bar
I honestly do not know for sure how this bar will work, but you can find it when you are doing those daily quests on the farms on the Valley of the Four Winds. We will know more about this when the quests are going to become available, and that's at level 90 I think.
Till then, the bar seems to be like a big reputation bar, from neutral to fully exalted, 42999 reputation.
Upgrade your game notice
This screen will popup, when the MoP is launched and if your account is not upgraded yet.
One screen to rule them all! Now, you'll find everything in your dungeon finder window. Dungeons, Raids, Scenarios and Challenges. The Challenges tab is not working at the moment and it has it's own look. We will talk about it when it becomes available.
Most of the interface windows allow you to toggle their help bubbles. I think this is pretty neat for the new players and for the new UI elements.
Loot Rolls Monitor
Those who are using the XLoot addon already know what this tracker/monitor is all about. Basically you can track every item and every roll for it while in a group.
Specialization and Talents
This is an expected change, since we already knew since BlizzCon 2010 how the new talent trees will look like. We have a completely new Spec, Talents and Glyphs UI. The images will speak for themselves.
Now I wonder, did I miss anything? Anything that's available? Because we still have to wait a few more builds to have a Black market, Challenges, Scenarios and PvP UI working.
Even so, what do you think about these changes?