https://www.techradar.com/news/mobile-computing/tablets/surface-pro-5-release-date-news-and-rumors-1316294

You might suspect that the 2017 Surface Pro is the closest we’ll ever get to the Surface Pro 5, but if Microsoft itself is anything to go by, you would be dead wrong. 

The Surface Pro 5 doesn’t exist right now, as Microsoft Surface leader Panos Panay confirmed last May, though he claims it will come to fruition once more meaningful changes erupt from the talent at Microsoft’s hardware design lab.