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Your ipod's earphones are nice, but it will be even nicer when everyone gets the chip in his/her head to experience music and information without transducers and their inevitable inaccuracies. It'll be like the funny Bluetooth thing that people wear on their ears, but inside.
3D movies will be like realistic dreams, except that you'll be able to remember them. You'll be inside games.
I expect that viruses will manifest almost immediately. Attacking some community or another via their head-chips will become a popular way to wage war. Of course, you won't be able to avoid advertising, all day long and into your real dreams too.
As usual, there will be old-fashioned people who resist getting the chips, and swarms of followers who just can't wait to join the new chip tribe.
The most enthusiastic rank of adopters will get every update. This probably means surgery every few months for implantation of new hardware. Even if they get something pluggable, plug and interconnect formats will change.