Famitsu (Google translated):
Unity Technologies Japan has announced that Unity supports "VR Goggles Toy-Con" of Nintendo Switch software " Nintendo Labo Toy-Con 04: VR Kit ". This will allow Unity to be used to develop applications that support VR goggles.
Google translated press release:
Unity Technologies Japan LLC (Head office: Chuo-ku, Tokyo; Representative director and chairman: Nobuo Toyoda, hereinafter "the company"), which provides a multi-platform integrated development environment "Unity", Nintendo Co., Ltd. We announced that Unity supports the VR goggles Toy-Con (hereinafter referred to as VR goggles) of the released Nintendo Switch Nintendo Labo Toy-Con 04: VR Kit. This allows Nintendo Switch developers to use Unity to develop applications that support VR goggles.
To become a Nintendo platform developer, register as a developer on the Nintendo Developer Portal. Please check the developer guide on the Nintendo Developer Portal for further information.
Nintendo Developer Portal
Since forming a partnership with Nintendo in 2013, the company has contributed to the supply of Unity-made game titles for many Nintendo platforms by supporting development tools for Wii U, Nintendo 3DS, and Nintendo Switch. We will also support the developers with the aim of releasing a large number of VR games developed with Unity in the same way for this VR goggles.