Dear god you people are petty. Never in any of the documentation does it say it charges the X1 or any laptop. Powered USB ports? Sure. Power a laptop through a power brick smaller than the normal one? Don't be daft. This doesn't appear to be an oversight on Lenovo's part, as it is truly universal, it appears to be the ignorant not learning how to read specifications for a product they intend to spend money on.
I have it and I use it as a utilitarian approach to add two extra screens, a combo MIC/Speaker input, and the addition more USB ports on my Lenovo Y500. Screen lag is of no matter because I play most items on the main screen when in the office, but it is not totally noticeable unless moving the player from the main screen to the others. Some screen flickering was resolved with ensuring matching refresh rates, and overall, I like that its universal for my multiple Lenovo products. Ethernet performance is not bad and seems to be fine for my uses.