Note that this is audience-specific--if you're writing for /., you shouldn't have to say...
Agreed - that's exactly what I'm pushing. Here on /. we should be expected to know about technology, or have enough interest to go look it up (or be mature enough to ignore it). One of the ways that /. can differentiate itself from other websites is by attracting a more technically proficient audience, and part of that is to implicitly establish the 'floor' of knowledge expected of participants.
Personally, I find this to be a good way to figure out what I ought to know - if something comes up and I don't know what it is I might ignore it the first time. And the second time. By the third time it's clear that I need to know more about it because clearly it's important.
Also - I love your technology examples :)