Update: Detta123 has pointed out in the comments that this is likely just an optical drive. Hopes dashed.
ASUS is giving no hints. We'll know tomorrow, but fill the comments with your best guesses.
Portions of this page are modifications based on work created and shared by the Android Open Source Project
and used according to terms described in the Creative Commons 2.5 Attribution License. AndroidCentral is an independent site
that is not affiliated with or endorsed by Google.