After decennia of developing leading-edge 2D video compression technologies, MPEG is currently working on the new era of coding for Immersive applications, referred to as MPEG-I. It ranges from 360-degree video with head-mounted displays to free navigation in 3D space, with head-mounted and 3D light field displays. Two families of coding approaches, covering typical industrial workflows, are currently considered for standardisation - Multiview + Depth Video Coding and Point Cloud Coding - both supporting high-quality rendering at bitrates of up to a couple of hundreds of Mbps. This paper provides a technical/historical overview of the acquisition, coding and rendering technologies considered in the MPEG-I standardization activities