As the summary points out, this is just a new recipe for making quantum dot tetrapods, for use in, for example, thin film solar cells where the cadmium selenide dots are encased in a polymer layer.
As with all stories about incremental progress in solar cell there are still a few hurdles yet to overcome:
Power conversion efficiencies from these cells are typically below 4% (eg. 1.8% original report, Sun et. al Nano Lett 3, 961). A good crystalline silicon cell will give you 12-15%.
Stability. Nanocrystals tend to go off pretty quickly and you don't want to be replacing your solar cell every week or so.
Cadmium is hella-toxic and _may be_ more so in nanocrystal form. A little vial of the stuff is enough to kill you, apparently. Makes you wonder about all those Ni-Cd batteries.
However, I welcome the (eventual) coming of our new tetrapod overlords.