That is exactly what this reminds me of, telescreens. I love the idea of being able to have a star trek like computer interface, but with all the processing being done off site it can and will be used in ways that violate our privacy.
We clearly need the Enterprise's central computer in our homes. With microcomputers getting more and more and more powerful, this should be possible (unless Moriarty turns up and takes control from the holodeck....)
In all seriousness, with Wikipedia being 22GB in textual state, it should be possible to build an offline system (that perhaps syncs online for news).
