Ahh well.
He said cartridges haven't been seen since the last Gameboy device (he's counting the DS as a gameboy I think) which is technically true BUT its been surviving for years with cartridges. They're as good a way of transporting content as any. A lot more convenient than 2GB digital downloads in my opinion.
Stylus. Yeah maybe it should have a capacitive touchscreen but how would you play ANY of the games without a stylus. Your thumb is good for quick taps but for games like Phantom Hourglass its needed, capacitive or not.
He's entitled to his opinion and he never actually says that the iPhone is better than the 3DS, he just has that damned hook title on his video. He poses the question at the end: Will it do as well as older consoles? Its twice as expensive as the DS, more expensive than a Wii and the games are 30x the price of iPhone games. With everyone and their mother having an iPhone these days it is a legitimate threat to Ninty. They'll go "Why buy a dedicated console? I can play games on my phone." Course the 3DS does games better but people are stupid. I do call bullshit on him saying the iPod and iPhone are "technically cheaper". They're not. They're just not.