I write this as someone who tried Roon for two months and didn't stick with it. Roon is more about music management and info concerning bands, artists and the like. Like the drummer on a particular track and want to find what other work he's done with other artists? Roon can help. Like a particular band and want to explore similar artists that you're not familiar with? Roon can help. Want to play an album and then continue with unselected backgrouind music for the rest of the afternoon? Roon can do this. There are other features along these lines including photos, artist bios, and the like.
I enjoyed these features but ultimately, for how I listen to music, didn't find it worth the price. I am perfectly happy to explore new music in the fashion that Qobuz offers it, but I know others who really value and enjoy Roon's features in the areas noted above.