AMD leaves the RX Vega 56, RX Vega 64 and Radeon VII out in the cold; claims it is listening
AMD debuted its Radeon Image Sharpening (RIS) on the RX 5700 series, an algorithm that it hails as delivering "improved image quality with virtually no performance hit". RIS uses contrast-adaptive sharpening (CAS) to improve image fidelity, making it more than just a filter through which every texture is sharpened. It is worth keeping in mind that RIS only works with specific APIs.
While AMD has made RIS open-source and has brought it to the Radeon RX 470, RX 480, RX 570, RX 580 and RX 590, there is currently an RX Vega-shaped hole in its hardware requirements. According to information obtained by PCGamesN:
AMD will gauge end-user reception and demand for Radeon Image Sharpening...and will consider adding support for additional Radeon RX graphics cards in the future.
In short, there are currently no plans to bring RIS to the RX Vega 56, RX Vega 64 or Radeon VII. Enough consumer pressure may make AMD see the error of its ways, although the above statement implies that it believes there will be only limited uptake of RIS.
AMD is currently holding a Radeon Software feedback poll, with expanded RIS support being one of the options for which you can vote. The company has not stated how many ideas it will develop into features, but expanded RIS support has already received just shy of 13,000 votes and is second beyond support for GPU integer scaling. You can vote in the poll here.