Linux is good in that you can combine things that work, so it is more flexible than windows. But desktop wise I don't see it becoming really dominant; GTK is now a GNOMEy-only toolkit. Qt is too busy focusing on their own business model. Desktop Linux is not useless, but it is really just sub-par compared to Windows. I also use Win10 on a second computer; I don't like it but I use it for testing. Linux lacks decision-making power focus (and corporations such as IBM/Red Hat are selfish, so these will never reach any "breakthrough" like the infamous Desktop of the Year, which I heard will come next year together with GNU Hurd ... I think).