The new chips are also designed to handle things like 4K video, VR, 3D, and other recent innovations on a platform-wide level.
The integrated HD 620 graphics built into the last generation of U-series processors is also getting rebranded to reflect that change in focus as UHD 620 graphics.
The new name is pretty much just window dressing though, given that the integrated GPU configuration remains unchanged from the previous model.
From Anandtech: “During our pre-briefing it was categorically stated several times that there was no change between the two (HD 620 and UHD 620), however we have since confirmed that the new chips will come with HDCP 2.2 support as standard for DP1.2a, removing the need for an external LSPCON for this feature. Other than this display controller change however, it appears that these new UHD integrated GPUs are architecturally the same as their HD predecessors.”
The V Y-series integrated GPUs are labelled as HD 615. The actual hardware configuration is the same as HD 620, but HD 615 uses lower frequencies compared to HD 620.