I've been using an HP Spectre X360 15" with a 4K touchscreen which is truly amazing. The only downside is that the one USB 3 port is not a thunderbolt port, making it not all that useful unless you get a dongle that allows you to plug in a regular USB cable.
Other than that, I've been enjoying it immensely and it made me stick to Windows at a time at which I really wanted to switch to Linux or MacOS.
Other than that, I've been enjoying it immensely and it made me stick to Windows at a time at which I really wanted to switch to Linux or MacOS.