http://wccftech.com/warframe-plains-of-eidolon-next-week-pc/

Digital Extremes just announced that Plains of Eidolon, the highly anticipated first open world zone coming to Warframe, will launch on PC next week while PlayStation 4 and Xbox One users will have to wait next month.

The press release also details several new features also included with the update, such as the new Warframe Gara, resource collecting (fishing and mining), weapon crafting, new weapons, new reinforcements and new mods.