Actually, that competition was there, before Linux distros had a DE. That competition is pretty hard to get rid of, or even come near. We at Linux distros don’t give a ready to use Linux system with hardware. We fight each other, distros, DEs, file managers, etc, and also taking away features. It is pretty easy to use a Windows 10 laptops, especially the touch screen ones and 2 in 1s. Swipe from the left, swipe from the right, from the bottom, and the Windows Key. Virtual desktops are there too.
Linux world is fragmented, and fights itself. iOS concentrates on one OS, DE and so on, Android too. Windows 10 2 in 1s are both laptops and tablets, can work in both ways in both modes - you an attach the keypad, but still work on the tablet mode or the other way, without the attached keypad. We, at Linux are not going there.
Its pretty hard to get a no OS laptop. A computer can’t be sold without an OS, so maybe, just maybe one might get a “Dos” laptop. A “dedicated” Linux laptop is pretty expensive, for a device that carries a free distro, free office suite. So, most laptops that run Linux in the world had been first bought as a Windows device, paying for the Windows OS. No, until Cannonical or some Linux only company creates a Linux laptop and market them with an OS, that competition cannot be taken up. (Oh, System76 etc are no-go.)
To bring the users of proprietary systems to Linux, just the OS is not enough. You need a dedicated device. Even Android is a competitor.
It can’t be expected from computer users to look for an OS, choose one and install on a computer. No one is ready to buy an expensive device that won’t run, after switching it on. Even if the person knows how to download a Linux distro, and even install it, he/she first have to have a device that runs an OS to do that. No, people are not ready for that. They need a ready to work device. The Linux world doesn’t give that.