I agree that we haven't seen a stand out game for awhile now. The last one I can really think of was Halo on the original X-Box. I had high hopes for Perfect Dark on the 360, but that backfired. Could be why we see so many more remakes now than we did a few generations back (like Mario All-Stars being a special remake event during the SNES era).
Certain games I feel will remain in ten years time though, even with the online requirements. I feel Blizzards games have staying power, such as Starcraft 2 and Diablo 3. Others have remarkable staying power, such as Binding of Isaac or Super Meat boy from Edmund.
Honestly, I feel the next revolution will be VR. A lot of the classics have involved transcending what one thinks is possible and combining that with great gameplay. The original Super Mario Brothers is a prime example, along with it's foray into 3D with Mario 64. Many of the PS1 era classics embody this as well, such as Tomb Raider, Twisted Metal, and Crash Bandicoot. Street Fighter 2 was a huge step over the previous title as well. Of course, it's possible to make a classic on older or current tech, just look at Symphony of the Night as a great example of this, or perhaps further back with Super Mario World. It seems fewer hits rely on this formula though compared to pushing graphics into new levels with great gameplay (Super Metroid, Donkey Kong Country, Starfox, F-Zero, MANY examples of this on the SNES). If someone can create a VR game with great gameplay combined with a new push into new tech, I think it could become the next major landmark for gaming.