Smart phones are not taking over

Last week I moved to another house so I had to stay without internet for 3 days which gave me the opportunity to try and live using only my iPhone.
I read recently many articles predicting the end of the PC era and claiming that soon, mobile phones will take over. I even thought so my self, but during those 3 days without a PC I realized that PCs will actually never die as a concept because of 5 simple facts:

1. Speed: No matter how fast mobile connectivity gets, wired will always be faster.
2. YouTube: YouTube is becoming as important as normal TV and the introduction of YouTube HD is making it even more addictive and more enjoyable. There are a lot of websites that cannot be fully enjoyed, or fully utilized, without a PC and a big screen. Even Facebook is not as fun on phones as it is on a PC.
3. Multitasking: With a PC, it’s much easier to multi task, we can read emails and listen to music and browse several websites simultaneously.
4. Convenience: PC means a big keyboard, big screen, big speakers, big mouse, big memory, it’s just convenient.
5. Affordability: A nice PC, with a 32 inch LCD TV, and a broadband internet connection, will cost you almost as much as an iPhone, and even cheaper in some countries.

I think smart phones indeed help us stay connected, but I don’t see them ever taking over from traditional PCs. I don’t even see laptops taking over from PCs. A lot of Bluray players now come supporting YouTube, and a lot of receivers support internet browsing, what we will see in the future is a marriage between TVs and the internet in every house. Complete entertainment systems. I think mobile phones will never take over.