Lenovo first announced Project Limitless back in May of last year, packing Qualcomm's Snapdragon 8cx 5G Mobile Platform. The Snapdragon 8cx is meant to provide performance that's similar to an Intel Core i5, and of course, 5G connectivity can offer computing in the cloud, while on the go.
What's particularly interesting about this PC is that it supports both sub-6 and mmWave 5G, and it's one of few devices that do, if there are any others. All of the other 5G PCs, which are all Intel-based, are sub-6 only. Millimeter waves are super fast, offering multi-gigabit speeds, but they can be blocked by literally anything, such as a window or a piece of paper. That's why mmWave is only part of the 5G puzzle, with lower sub-6 frequencies able to penetrate walls and such.