This thread below may be of interest to you, not sure if you had pre-ordered the air filter, or just the glowforge, but I believe the filter has been available for over a year now? I don’t have the filter, so hopefully my info is correct and I’m not confusing the issue…
From what I know, venting outside is the preferred method, but the air filter is relatively ‘compact’ and is the only real option if you are not able to vent outside. It’s not cheap though, and the filter cartridges need to be replaced fairly often depending on your use (they are not cheap either).
The actual air filter is also listed on the products page (near the bottom):
I don’t believe I have seen any announcements about continuing refinement or future air filter plans, but then again, I vent outside so I don’t necessarily pay close attention to those issues.