Here’s the summary for the wikipedia article you mentioned in your comment:

The Surface Neo is an unreleased dual-touchscreen 2-in-1 PC that was unveiled by Microsoft on October 2, 2019. Slated to be part of the Microsoft Surface family of devices, the Surface Neo was designed to be used in various "postures" for different use cases and multitasking scenarios involving its screens, and feature Windows 10X—a variant of Windows 10 designed exclusively for dual-screen devices. However, as of December 2023, over four years after the Surface Neo was announced, it is still unreleased, likely rendering it vaporware. The Surface Neo was expected to be launched in late-2020, alongside a range of other Windows 10X devices from third-party manufacturers. In May 2020, Microsoft postponed the release of Windows 10X-based dual-screen devices in favor of launching it with single-screen devices instead. This did not come to fruition, and Microsoft eventually cancelled Windows 10X outright in May 2021, with aspects of 10X repurposed for the mainstream Windows 11. Its sister device, the Android-based Surface Duo, was released in September 2020.

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