That’s usually listed on the acceptance email that gets sent out to purchasers, although I haven’t seen the latest. (It was for all of the pre-orders, so we knew going in what to expect.)
They’re still working on finishing up the Passthrough alignment software, but I’ve been using it for almost a year now…with and without the Snapmarks. So while the ease of use is not there yet, the passthrough is perfectly functional, and gives great results.
There are a couple of tutorials here that can help if you want to get started using it before the software release, and it’s probably concepts that we need to be familiar with anyway.