Which is not to say each is not also stunning, excellent and thought-provoking.
First, take off your sunglasses, remove the accelerometer-containing device from beside your keyboard, switch off your implantable cardioverter defibrillator's wireless antenna, and check out what Avi Rubin has to say about all of your devices:
So, even if you hadn't already heard what Ralph Langner (inter alia) has had to say about Stuxnet, you can tremble with me at the thought of what the script kiddies going to get up to with exploits like those on our highways and in our cardiac outpatient services parking lots.
By way of preface to the second featured Ted talk, a reflection: I am acquainted with some xtians who say that, come judgment day, each of us will have to stand before the THRONE OF THE ALMIGHTY and explain what we did to stop the Bush Wars, a decade or so ago, when they were beginning (and ever since, in novus ordo seclorem), but they seem nonplussed by my expression of parallel sentiment, that each american of our generation will be reincarnated as an Iraqi infant. A passage from Paul Gilding's "The Earth Is Full" -- what will you say when you grandchildren ask why you didn't do anything? -- reminded me of that. (there was some further ado, but i have elided it)
Lest you think, Dear Reader, that it must ever be all grim and frostbitten doom and gloom (and true grim and frostbitten doom and gloom, I hold as more or less an article of faith, is indeed one thing that we all have in common), I mean to come back soon and point to some less-scary fare over there at TED. Until then, please enjoy La Vie en Rose, in general, and also as performed by Thomas Dolby and Rachelle Garniez: