If you are wondering about the future of the World Wide Web, look no further than this speech from the TED conference earlier this year, by the esteemed creator of the World Wide Web, Tim Berners-Lee. He is positively effusive about where he envisions the web going from here, and he gives a nice background of where we've come from to give some context to his talk. We have linked documents, but now Berners-Lee argues, we need linked data.
This is a fascinating talk and what jumped out at me was how excited he was about all of this. Rather than being jaded after after 20 years in the field, he's genuinely pumped to take this to the next level. If you have even a hint of geek in you, this is must-see video.