"Personal computers will be a big hit." "Internet search will be an extremely important and profitable business."
These statements were absolutely not trivially true at the time when personal computers started, or when Google started.
Can we collect important statements, which were not trivial 10 years ago, but seems to be fairly trivial now? (Regarding topics in which HN can be interested: mostly innovations.) A more interesting, but harder question: what happens if we take 5 years instead of 10? (Can we see clearly enough in this case? In what time-granularities can we think? What is the pace of development?)