Japanese create artificial DNA

From Next Big Future:

A new class of DNA-like oligomers made exclusively of nonnatural, stable C-nucleosides. The nucleosides comprise four types of nonnatural bases attached to a deoxyribose through an acetylene bond with the ?-configuration. The artificial DNA forms right-handed duplexes and triplexes with the complementary artificial DNA. The hybridization occurs spontaneously and sequence-selectively, and the resulting duplexes have thermal stabilities very close to those of natural duplexes. The artificial DNA might be applied to a future extracellular genetic system with information storage and amplifiable abilities.

While I’m a neophyte when it comes to manipulating DNA, my understanding after reading the article is that this is the first time DNA has been created from nonnatural nucleosides. I wonder what the potential applications are, if any.