Great artwork & best use of gyroscope/parallax effect I've seen. Feels just like a hologram. Default theme looks great. Premium themes & options are clearly shown.
Developer also has other great live wallpapers - a couple of which are featured in...
Nice view of the solar system - like other Kittehface LW's it has no options in free version but looks cool anyway :) Paid version offers a number of configuration options including different themes and hiding the orbit rings.
Another nice flying island LW. This one is not 3D but rather a number of floating static images. It all comes together nicely though for a relaxing visual (I know it's not quite sci-fi but doesn't quite fit with the natural theme either).