I was very interested last year but it was missing tons of features, and today it looks like nothing really changed.
I think I'll still buy it and wait for updates.
Since MAY 26TH, 2013
Changelog
New Features
Added Day/Night cycle
Added vehicles ('E' to enter/exit/flip)
First player to enter will be the driver
Can accomodate one other player as a passenger
Players can flip the vehicle back on it's wheels
Can be destroyed
Added new terrain to Creative Mode that will be better for driving around in
Added throwables ('G' to throw, 'H' to cycle to next type)
Frag grenades
Smoke grenades
Glowsticks
Hovercrafts (craftable)
Procedural forests are now physically simulated; trees respond to collisions, can bend, sway and break.
Added the "Forging Terminal", an object you can forge which allows you to extend the area where forging is possible.
Turrets will "stick" to things and remain locked in place rather than tumbling all over the place.
Turrets can be attached to other physically simulated objects, including spinning slammer turrets.
Procedural infinite terrain has arrived, prepare yourself to wonder about this randomly generated world.
Get lost in dark caverns, or scale to the highest mountain top! Every time you load in, you will get a new experience.
Be careful and keep your eyes to the sky though, a blizzard or thunderstorm could roll in at any moment!
New trees are growing freely throughout these new landscapes, though they seem to be made of some strange material, and currently cannot be harvested for wood. We are working on a cure for these sickly trees.
New user interface.
Enjoy the new dynamic UI, as it grows with you, and organizes your inventory for you based on category and type.
There has been visual improvements to the day and night cycle, including light rays from the sun.
The hot-bar now simply fades, instead of scrolling off the screen. That way it is still visible to player, without getting in the way.
You now craft throwable items, instead of having an infinite source. They are crafted in your inventory, like other items. Instead of throwing them with a simple key, you now bind them to your skill bar like other items, then simply press that key to throw them.
You can now toggle Depth of Field (DoF) in the options menu.
Notes regarding infinite terrain.
You can still play the original map from v0.36 at any time in single-player. Using the procedural terrain is optional.
Infinite terrain is currently only available in single-player mode. Multi-player will still be using the pre-rendered map from v0.3.6.
It is extremely resource intensive, especially if you have trees enabled.
This feature is still very much new, and crashes are likely. This is due to the high memory usage of the terrain creation.