If you really wanted a next gen game you'd want it to be at least 100GB in size, with half or close to half of that on very high res textures (4K+, everything from the trees down to the daggers to the cups) and build it with a 290X and 780Ti in mind backed by a 4770 at least. You'd want the AI's and NPC to be close to fully independent and capable of a massive amount of stuff (at least a few hundred simulations randomly generated), a procedural gigantic world that would take at least a few real world hours to walk or ride across filled with dozens upon dozens of things to do thanks to all that random generating (and nothing repetitive or fetch quests), DX 11.2 only with proper organic lighting and shadows and a quest line that is at least 80hrs+ long alone.
Now no console will ever do that, so forget it. There will never really be next gen unless its 100% PC exclusive.
You can have a PC exclusive title but have none of the next generation gameplay, sound effects, graphics, AI, complex NPCs, etc. Even if a game is made exclusively for the PC, it doesn't guarantee that it will be a next generation title at the time of its release. Conversely, just because a game is a cross-platform title (Crysis 3), it doesn't mean it cannot be considered a next generation. Finally, one can have a next generation gaming experience that's exclusive to consoles only, such as
Uncharted 4. The game doesn't have to be a PC exclusive for it to be a next generation gaming experience either -- it can be cross-platform, PC exclusive, console exclusive. Your argument is not logical in nature because if we believe what you say, then there will not be any improvement in games from now to infinity.
According to you, no game that is cross-platform with consoles can ever be considered a next generation game. That's bullocks. Sooner or later there will be games with more advanced AI, physics effects, higher quantity NPCs, 4k+ textures and graphics that will
blow Crysis 3 away. Are you saying that BF5, 6, Tomb Raider, AC, and other such games will never exceed the level of today's games just because they will be cross-platform with PS4/XB1? That's bullocks. Also, a game doesn't need to be 80 hrs+ in length to be a great game/next gen game. The focus should is on
quality of the campaign, not quantity. I'd rather play an 8-10 hour interesting game than a boring, monotonous/repetitive 80 hour game.
I have no doubt that Witcher 3 maxed out will overwhelm a 780Ti Ghz and in the next 3-4 years over the life of PS4/XB1, there will be lots and lots of cross-platform titles that will make current generation GPUs look overpowered. It happened every single console generation in the last 20 years. PC will be ahead graphically but today's GPUs have no chance in coping with next generation games once developers exclusively focus on PS4/XB1 development and are no longer anchored by ancient PS360 consoles.
Games such as Witcher 3, Dragon Age Inquisition, The Division and Uncharted 4 are just the beginning of the next wave of games. Does anyone really believe the current consoles will be replaced in the next 4 years? If not, then we shall see a large leap in PC graphics for which we'll need Maxwell and then Pascal generation of GPUs.