It's interesting to see that for the last five to ten years, people have been pulling computer applications from computer to make standalone products like VCD player, DVD player, mp3 player, etc. All these were very successful.
However, the trend seems to be reversed these days when smart-phones and tablets were getting popular. You will probably not use a standalone mp3 player, and you will probably not use a standalone DVD player, instead, you watch movies and you listen to music via your tablets there days.
While it could be nice if a single machine could do everything for you, however, it could even be better if things just get smaller. For example, even your tablet is powerful enough to play music but then you will still need a headphone/earphone! What if your headphone/earphone could play the music by itself? If it can, your tablet will not be necessary any more.
Content-wise, putting stuff in the cloud for centralized storage and manipulation should be the best.