I tend to disagree with it just being a USB connection. If you purchase a thundebolt cable and connect it to a mac with a thunderbolt port, there is a big difference in connection speed. I use it daily as a virtual screen for my macbook pro and compared to the wireless network (I have an Orbi 970 series), it connects way faster. I don't experience any lag at all. The best benefit for me is that I can use it as a virtual display at a coffee shop (coffee shop name not mentioned), I am not limited to the connection of their wireless bandwidth which is typically slow. Transferring files is also blazingly fast. Again, try using a thundebolt cable and you'd feel the difference.