I don't have the patience or inclination to sit through the 26 minutes of the first article, but the second one is just plain dumb. It's filled with logical fallacies and false 'facts': consoles always sold at a loss, yet the Wii never was and the PS3/360 only in the beginning; if you care about graphics you'd buy at launch or game on a PC, which totally ignores cost and people waiting for specific games to come out; that tablets/phones are automatically more convenient, even if the library is thin and they don't offer any where near the same type of multiplayer experiences (online and real life); or if you want more from a game experience than what Angry Birds has to offer, you'll migrate to a pricier, more trouble prone PC platform.
I'll agree that phones and tablets will hurt console sales (even more so on the portable side), but it ain't going to kill 'em.