If you've been keeping an eye on the Steam Machine, here's a reason to pay closer attention. New details have emerged suggesting that Valve is preparing a reservation queue system for the device ahead of launch. This could be a direct response to the chaos that followed the Steam Controller's release , which sold out almost immediately and landed largely in the hands of scalpers. According to Wccftech , users digging through a recent Steam update uncovered code pointing to four distinct Steam Machine packages and two Steam Frame packages, alongside existing entries for the Steam Controller and Steam Deck. The four-package breakdown strongly implies multiple models will be available at launch. Mashable 101 Fan Fave: Vote for your favorite creator today! Mashable Light Speed Two are already known — a 512GB and a 2TB storage configuration — but the nature of the remaining two is still unconfirmed.…