What’s the endgame for the Semantic Web? I’d propose that it is a web where any information you input is immediately cleaned up, structured and connected to the rest.
The need for more effective data structuring technologies is nothing new, but this time, whoever gets it right and ties it together in a nice application that leverages the open channel created by Linked Data (if it can be made to scale to web proportions), could well be on its way to dominating a new sort of web. The key is to turn unstructured data into triples that make sense.
By itself, Linked Data is unlikely to be a source of blockbuster application: but the newly-created ability to link data in more flexible ways will act as an echo chamber to other technologies, giving them a much larger market and amplifying their success. If you want to be successful, consider mashing up Linked Data with other technologies.