Depending on what you want to hear, sound quality matters a lot. For background sound, or podcasts, it doesn't matter much.
For focusing on ambitious music, it does matter to me. Another factor is choices of music. I like to pick a CD, or sometimes even vinyl. If I am in the mood to hear Mendelssohn's Scottish Symphony, Can I do that with wireless?
Here's some info: Bluetooth vs. Wifi vs Wired Speakers
The expert's conclusion: ... the best working speaker system will always be wired speakers. Their ability to transfer massive amounts of sound data physically from source to device without any interruptions will always put them at the top of the list. Just be sure to invest in a good set of amplifiers and speakers to complete the whole system for the highest quality sound.
I also want to mention that I feel the idea of surround sound is silly.