1) people don't know what they want. The press, the detractors, they all want to be 'wowed'. They don't know what 'WOW' looks likes or consists of, they just want it and seek it.
2) people have either unexplained or unrealistic expectations. Listen to some podcasts, read a couple of articles, and hear some of these journalists, enthusiasts talk off the cuff, and you'll hear some pretty wild things if you know anything about how games are made or how programming works. "Why is every open world surrounded by water or mountains?" "Why can't I always go anywhere?" "Why can't every character always have something unique to say all the time?" "Why can't every character have their own story and role across the entire game" Things that just aren't feasible for coders and machines today. Alot of people don't know what's feasible, what reasonably lies within gaming's limits. With expectations running unbridled that like that.
3) The things Sony mentioned are little Big things. They are options and features you have to use to appreciate. A lot of what Sony showed is a foundation. Every console starts with a vision, a goal. And that goal is laid out over time and usually evolves and branches out as technology and time move forward. The launch titles, the games, the OS, and even the vision can evolve. They set out to convey what their vision is...focus on the gamer. This is the start, the reveal...this isn't E3. This isn't year 3. Its a cycle.
4) Our media is cynical, suffers from selective short term memory, has a tendency to panic and worry, and not look beyond a headline. Everything is a conspiracy, a trick, a gross miscalculation, an exaggerated level of incompetence, or an over-simplification of circumstance. Hate or love Killzone: Shadow Fall (or feel somewhere in between) but to follow this industry for any length of time and glaze over the fact that its a launch title and what that implies is just ridiculous. To knowingly go into a conference where we know pricing won't be discussed, nor release date revealed, nor will we see all the games in development...its just ridiculous. We've been here before. We know how this works.
5)"Show me new things every day." "Everything should be a surprise." Remember Destiny, its from Bungie...everybody loves Bungie...they made Halo. Bungie reveals Destiny on Sunday. People are intrigued and it dominates the news cycle. Bungie shows up at the PS Meeting...its old news. Watch Dogs...its old news. Unreal 4 demos, Agni Philosophy demo...old news. Nevermind that no one's played them or seen most of what they're about, we know it exists, what else you got? I mean its really simple....Show me everything, tell me everything, make it all gameplay, but make it all polished cause I'll judge it as is otherwise, and make sure all the 3rd party studios do the same, but make this meeting short, oh and save some stuff for E3, Gamescom, Pax, GDC, TGS, VGAs, etc. Whatever you show me today exists in a vacuum. Show me Killzone, Infamous, Knack...and I'll scream for more games...I'll clamor for you to get on the ball and get studios on new IP. And when you reveal more to me 3 months later, I'll say you finally listened even though games take years to develop and had to be in the pipeline way before you showed me anything.
6) MS hasn't shown anything.
Its a combo of all those things.