There will always be a market for bookshelf speakers. Why? Because stereo sound is special.
Music recorded in stereo needs to be listened to in that format unless we are content with listening to single loudspeakers again, which attempt to simulate stereo or even surround sound with multiple drivers packed into an enclosure the size of a coffee can.
Bookshelf speakers do a rather convincing job recreating the soundstage; the physical space (studio, garage, music hall) where the recording was made and that illusion of being there with your favorite artist is a big part of the experience.
Additionally, bookshelf speakers reproduce the scale of the recording in a far more convincing way; crank Led Zeppelin’s “Kashmir” through an HomePod mini or an Amazon Echo and you will discover how poorly smart speakers reproduce the dynamics of a challenging track.
Passive or Active?
If you really care about sound quality, there are plenty of passive (which require amplification) and active (with built-in amplification) loudspeakers to select from.
Passive loudspeakers are more flexible as you can experiment with different types of amplifiers, DACs, and placement options. Active loudspeakers are a better option for listeners who don’t want the added expense of multiple components and an equipment rack filled with cables.