And, as an added bonus, it's configured to function as a fleet command vessel.
It also varies from traditional science vessels in that it focuses power output on the hull rather than shields. It's inspired by the Intrepid-class ships of the 24th century, but features updates intended to make it faster and more easily maneuvered. The Janeway Class vessel is a Tier 6 Federation ship featuring a Command Science / Command Specialist Bridge officer seat, as well as a Lieutenant Universal / Miracle Worker Specialist bridge officer seat. If you're not sure exactly which model that is, think of the Voyager-J.
The game's devs announced today, via twitter and a post on the site, that the first ship from that era to join the lineup will be the Janeway Class Command Science Vessel. Star Trek Online players will soon be able to explore space in their very own 32nd century vessel.