I'm a bit nonplussed. We already have very good tools for precisely making arbitrary changes to existing chromosomes. Creating one from scratch is a cool party trick, but it doesn't actually seem all that useful. Unless you are also proposing to design a chromosome from scratch, which nobody is.

It is extra fun that this was done by massed ranks of undergraduates working in ordinary labs, though. You could call this a sort of crowdsourced sharing economy of genomics. Or a genomic sweatshop, depending on your inclinations.