Pff. Rookies.
In other news!
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http://i.imgur.com/e0VJYcg.png )
- New Loading bar. The above picture is from Cenx' profile.
- Kane hints, "there might be more to this than meets the eye". New biome perhaps?
- The symbols seem to represent corruption/grass on the surface, gray rock in the middle and orange hell/lava underneath. Remember, this update may have the Dante's hell facelift we've been waiting for.
- There are two loading bars, probably one of them is for the particular phase in generation ("adding more grass") while the other is for overall progress.
- Kudos to Criddle for noticing the colored outline on the top Terraria logo!
- The remainder graphics on the loading bar could also be a reference to new content, such as bosses, factions, helmets or other.
Initially, it seemed like the two ends were helmets of some sort, the right one a grass helmet with a sword and the left one more evil, perhaps just a creature head. The fact that both have a gem-like thing is interesting, speculation could lead to that being some sort of attainable trophy or object.
What's interesting to note is that the progress bar on top seems to go from Corruption to Forest, whilst the bottom one, indicating obviously that it's the underground below those two, stays gray and uncorrupted throughout the entire bar.
Chances are that the "fill" inside the loading bar on top is also gonna turn more greenish as it advances towards the green counterpart, but who knows.
The idea that the world might now revolve around itself also popped up.
I also had some thought about sky islands and height distances, but I forgot what that was.
There's also of course the notion that just like the progress bar, you're supposed to go from "corrupt to noncorrupt" to unlock something, but that would require a major game model change and isn't something I'd speculate in.
Neither is the notion that the underground will remain uncorrupted past hardmode, or is somehow supposed to become uncorrupted. It'd be more likely that the biomes have a continued development, possibly even a new biome to fight.
The loading bar might indicate that the Corruption is being made, but I doubt this, considering I think Corruption is made after Forest.
Notice that Hallow does not seem to be represented.
Sources:
http://forums.terraria.org/index.php?members/cenx.5/&page=5#profile-post-46152
http://www.terrariaonline.com/threads/new-generation-loading-bar.181759/