AMD's Ryzen Z1, the all-in-one processor that powers the Asus ROG Ally and Ally X, and the Lenovo Legion Go, has been confirmed to be replaced with an updated sequel. Officially called the Ryzen Z2, the semi-custom chip won't appear until next year and it's hoped that more vendors will use it than the original Z1.
Even if you only have a casual interest in handheld gaming PCs, you surely will have noticed that when it comes to the chip that powers the device, almost every vendor goes with an AMD Ryzen APU. The Steam Deck uses a custom chip, designed specifically for that handheld, but most handhelds use something like the Ryzen 7 7840U.