Some additional features include an optical touchscreen, a physical on/off toggle for the webcam, automatic brightness adjustment to conserve energy, an easily removable back for in-house tech support, and security features like encrypted storage drives. Lenovo has posted a brief video discussing the design process of the ThinkCentre M90z, and you can watch that on YouTube.
The AIO is currently available through business partners and it will be on Lenovo's site later this month. It's already used by the Center for Severe Weather Research, who brings the machine on the road when tornado chasing. Pricing starts at $899.