Not all changes need to be radical. Sometimes the changes are smaller, like the move from 78's to 33's. Or in HT, the move from Dolby Prologic to Dolby Digital to DTS.
Right now, the only radical change I think possible would be a change to a format like MP3 or Windows Media. I do not believe MP3 has reached CD quality, but the next generation might. I see that the newer players have options to decrease compression. There is value to having players with no moving parts. Digital files also are easy to duplicate so the record companies will continue their legal battles. I do not foresee a high-end version of MP3 this decade, but MP3 could negatively impact CD sales.
Right now, the only radical change I think possible would be a change to a format like MP3 or Windows Media. I do not believe MP3 has reached CD quality, but the next generation might. I see that the newer players have options to decrease compression. There is value to having players with no moving parts. Digital files also are easy to duplicate so the record companies will continue their legal battles. I do not foresee a high-end version of MP3 this decade, but MP3 could negatively impact CD sales.