Games are slowly moving there, the difference is developers who aim for realism aren't fixated on just one aspect(in your example, the character).
They have trees, cars, guns etc that need to match the characters level of realism.
You also need to take into account that making realistic games for people with GTX 980's is financially unviable.
And animations, interactions with the environment - including with people and the consequences of doing awry stuff, that's all incredibly hard.
I would like a game were the people ask you to stop when they're giving a presentation (or briefing) and you're constantly switching the lights off and on, or standing in front of the projector, or piling up chairs and crap on people's desks.
Just some reaction, don't necessarily send the security guys every time, which would undoubtedly turn into unneeded murder. Awesome would be if there's some dynamic composition, context-sensitive, of sentences spoken by the AI guys (even if your playing character remains speechless or has a choice of one or more lines at scripted events)
Of course, to create the perfect game you'll need at least five years and a really huge budget, that's becoming a little Mahnattan Project.
Now, about the problem of limited audiences. PS4, Xbox One sort of solve that if you're not unhappy with the results - keep in mind we'll have years of content creation and compute shaders etc. maturing ; and PC games will probably be the better for that.
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Another way I'd like to see is a return of Arcade gaming. If you want to make a ridiculously impressive game tailored to incredibly powerful hardware, why not do it as an arcade cabinet? (with PC hardware in it of course, perhaps with a downclocked GPU to save on power)
You can then have ridiculous realism, or something completely unrealistic but ridiculously good lighting and IQ, looking like some older CGI reels.
The bonus would be (aside of not having to acquire and set up hardware, game, even microsoft/sony/whatever account) that on an arcade game you wouldn't spend 80% of the time in tutorials, cut scenes and exploration.
But maybe the economic model is doubtful, or the game would be too expensive to play (I remember those racing rip off late 90s/early 00s.. Drop some serious money like four time the cost of playing older arcade games, play for barely a minute and it's game over on missing the second check point)