Microsoft reportedly testing three new Surface all-in-one PCs

Microsoft may be preparing to launch three new Surface-branded all-in-one (AIO) PCs later this year. Reports of a Surface AIO first began in June when DigiTimes claimed that Microsoft is planning a Surface AIO as an alternative to the Surface Book. Windows Central now reports that Microsoft is testing three display sizes: 21-inch at full HD, 24-inch at 4K, and 27-inch at 4K. Microsoft is just reportedly testing the devices, and it's not clear if the PCs will ever make it to the market.
Micr