As a Windows Store App Developer, you’ll be happy to learn that the publishing process has been improved!
Key things are:
1. Simplified app certification requirements.
2. Manage your app availability (you can temporarily take down your listing).
3. Set app release date/time (including ability to change it while in certification, without resubmitting).
4. Ability to remove your Windows 8 app list and show only your Windows 8.1 app listing.
Read full details: