The answer is simple.

1. Last gen lasted way too long which built up high demand for new consoles.

2. Wii U, even with it's year head start failed to impress the core crowd. While more casual gamers just thought it was an add-on.

3. Microsoft left a bad taste in gamers mouths with their original pre 180 policies.

4. Sony knocked it out of the park during their 2013 E3 presentation. Less restrictions and $100 cheaper price tag really was the knock out blow.

5. Resolution gate. This is really more relevant to the core crowd, but the core crowd are the ones that get the hype going for a console. Once word of mouth spread that the PS4 had the better looking versions of multiplats and was $100 cheaper than the XB1 it just made sense that the average gamer choose the PS4 as their console of choice. In the end multiplats are what the vast majority of gamers play. Exclusives are great as well, but they tend not to be as important as they once were.

I don't know either actually. Its a good machine but I've been underwhelmed. I've had way more fun on Titanfall and Forza 5 then anything on the ps4. One thing I've learned on my short time on this planet is that some things dont make sense. The ps4 is just the cool kid on the block and sometimes that's all it takes.

A lot of it is PR in my opinion . Sony has been very open about just about everything and gamers respect that.

Really Vance, you just copypasta it.

Why so lazy?

Did someone say Public Relations?

I think people are taking his statement too seriously

Ps4 has still not convinced me to buy it, so far the only game that interests me is MGS PP.

Absolutely.

It's a pretty simple statement. It's not like he doesn't know the things we know (good hardware, good price, good games, sided with gamers and developers instead of with mega-publishers, etc.). He's not ignorant.

He simply didn't expect it to explode at such a historic level... No one did, so that's not unusual. Right now, he's struggling to completely explain the unprecedented success. While this suggests some obvious success for Sony as a whole, it also suggests that the demand for new consoles is at a historic high. That's actually really interesting.

The weird answer from that interview is:

"Why buy now then?

Shuhei Yoshida: Well, yeah. I don't know."

I could think of many reasons why one should buy a PS4 so it is a bit of an odd statement from someone as high up as him.

Because it's the second such thread dealing with the exact same topic.