Sounds like you didn't watch or read a summary...

Instantly play digital games
Sleep mode
Use tablets, Vita to display maps and other things. Vita can play PS4 games on the go.
Backwards compatibility through the cloud
Records everything you play - upload while you play
Broadcast your gameplay - your friends can watch you playing live and help you out
Easier to develop for - this is a huge plus, since PS3 was notoriously hard to develop for.
8GB RAM - no more OS limitations. Expect everything you'll ever need from the OS
Try any digital game instantly (Gaikai)
etc. etc.

X looks nowhere near as good as Killzone Shadowfall.  The buildings in Killzone Shadow Fall are reflective and have real time lighting effects.  You don't see that in X which only looks about on a par graphicswise with "The Last of Us".   Actually, I just took another look at the X trailer and one of the biggest differences that was the most readilly apparent to me was the paucity of the number of objects on the screen versus what there was in Killzone Shadow Fall.  The screens in Killzone Shadowfall were heavily populated with characters and actions.  In X you have some static seeming backgrounds and maybe a character or two and then one big monster, but that's about it.

I'm not really anymore impressed by that than I was some of the games Sony showed off at their Vita conference earlier this week.  

Well, that's the only way they're going to get Wii type numbers.

Not after both the 720 and PS4 come out and Next Gen really begins.  There's just no way to backwards port games from the true Next Gen systems to Wii U in ways that won't make the Wii U versions look like crap.  And having X86 Geared Architecture plus clockspeeds in the Terraflops (while Wii U doesn't have even one Terraflop) + 7 to 8X the Ram of Wii U means that PS4 and 720 will allow developers to push their dream projects in ways Wii U can't.

WiiU for me, easily. A big part of this is because I'm a fan of Nintendo's IPs, but to be honest, I saw nothing in Sony's conference that made me care about PS4.

I play mostly Japanese games, and the ones mentioned didn't do anything for me, unlike Bayonetta 2 or The Wonderful 101 for example. Deep Down seems to be following the aesthetics of Dragon's Dogma, which I don't really care for, and we don't know anything about Final Fantasy, which was expected to be announced eventually anyway. And if that Agni's Philosophy demo is supposed to be a glimpse of the next game, I'm not liking what I'm seeing... Realistic "Middle-East" settings with mutating animals that appear to be taking from Resident Evil is not what I want from a Final Fantasy game.

I have practically zero interest in FPS games and driving sims, and Knack is visually unappealing to me, without anything that stands out gameplay-wise either. I understand that for some people the visual potential of the platform is very important, but personally, I couldn't care less. That potential is irrelevant to me if I don't care for the concepts that take advantage of it, both aesthetically and gameplay-wise. And if I did care that much, I would just stick to PC gaming.

The only game that really caught my eye was Watch Dogs, and even then, not that much. I'll probably end up playing this one on PC eventually, if I ever do.

As far as the platform features goes, I do have interest in having a second screen in the controller to play games while the tv is busy or some extra gameplay features like on WiiU, but I'm certainly not going to buy a handheld I don't care about for it... And while not having backwards compatibility out of the box was expected, it doesn't cease to be disappointing... I have no intention of playing games through the cloud, much less ones that can be played on other platforms "physically", so that's not an option for me.

Playing games while you're downloading them is nice I guess, but I doubt I would even use it. I think I would prefer to download everything first anyway. And finally, any social features are irrelevant to me on any console, and including a "share" button just for it on the controller is something I don't really care for... To make things worse, some things mentioned in the conference made me question the privacy aspect of the platform... What exactly is that about the PS4 "getting to know you" and even loading games you want "before you even click the button" ? What kind of information about your preferences is stored and how ?

In any case, I'm one of those late, late, late adopters that can't afford to buy a platform until the end of its life, so I guess my opinion doesn't hold much weight... And there's always the chance of changing my views of the platform in the next few years... After all, this is just the beginning.

Not sure if serious

He means that the PS4 sequels shown don't look like that dramatic of a graphical leap over PS3 games, where Wii U games looks leaps and hurdles better then Wii Games. Hence games like XenoBlade 2, while still a sequel, will be "Fresher" where PS4 sequels will be pretty more more of the same. Metroid, Smash Bros, and Mario Kart will all feel like very different games where GT6, InFamous and Uncharted might feel a lot like their PS3 counterparts.