Synthesis is still quite expensive at a penny a base, much less a dime a base. To give a comparison to sequencing, costs are about a penny a megabase (~7 orders of magnitude cheaper). We have a long way to go.

Even for a small bacterial genome (1Mbp) that's $10,000 at a penny a base. To have any real power, I'd want to build at least thousands of them which is a little out of my price range.