Your assertions aren't based in anymore fact than his are. It's just a bunch of educated guesses at the end of the day. The way technology goes nobody can really predict what will be the next big boom, I just don't think these predictions are that much of a stretch.
Fact 1: using a touch screen all day would be much more tiring (and expensive) than using a mouse.
Reasonable guess 1: because of fact 1, businesses are unlikely to shift from mice to touchscreens anytime soon
Fact(s) 2: the world-wide internet infrastructure sucks ass. Slow download speeds, bandwidth usage caps etc. HD-streaming is nowhere near ready for prime time world-wide. Meanwhile, our HD movies are supplied on 50gig discs and in a couple of decades we'll have a new >HD video format that will require even greater storage space.
Reasons guess 2: Because of fact 2, in ten years optical discs will still be needed.
The article's guesses are unreasonable because they take current gadget tech trends and apply them to day-to-day life without thinking for a single moment about the utility of those guesses. Businesses don't adopt a new technology unless said technology is better in every conceivable way. See: fax machines still being around when email exists.
These articles are just "this is what the American middle class consumer is doing right now, so in ten years time businesses and people around the world will obviously follow suit and your current, proven tech will be as dead as the dodo". It's silly.