This sounds like a variant on the PCR test that has been around for a while.
The main innovation is lowering the cost. This test is more like 99.5% effective
http://uk.gay.com/article/3663
The test is a bit more expensive than regular testing-but it is the first time
that it seriously looks like testing alone would clearly be better than condoms(at least if you thought it was pretty unlikely your partner had been infected the last 10 days). Condoms would still help somewhat-and would help with things that might not be tested for(or even well understood yet).