This is more aimed at the Xbox One as it is less powerful than the PS4. I think that we may see a couple of games below 720p, but not many. With Watch Dogs and Titanfall at 792p, we are getting close to 720p.

Witcher 3 on Xbox1

I mean a resolution less than 720p, not at 720p :P

Crysis 4

But seriously, if we do, I would laugh! Probably not though cause I think its basically a min requirement to run 720p reguardless of how good/bad the game might look at that res

There were a good # between both of them, just looking at PS3:

Aliens Vs Predator = 1120x630 (custom AA)
Alone in the Dark = 1120x630 (no AA)
Avatar = 1280x692 (QAA, black borders)
Backbreaker = 1152x640 (2xAA + blur filter)
Beijing 2008 = 1024x768 (no AA)
Bionic Commando = 1120x640 (no AA)
Bioshock = 680p (no AA, blur filter pre-patch)
Brutal Legend = 1152x720 (no AA)
Call of Duty 3 (screenshot) ~1088x624 (2xAA)
Call of Duty: Black Ops = 960x544 (2xAA)
Call of Duty: Modern Warfare = 1024x600 (2xAA)
Call of Duty: Modern Warfare 2 = 1024x600 (2xAA)
Call of Duty: World at War = 1024x600 (2x AA)
Call of Juarez: Bound in Blood = 1152x640 (4x2 custom edge AA)
Chronicles of Riddick: Dark Athena = 1024x720 (QAA)
Conan (demo) = 1024x576 (no AA)
Dark Sector = 1152x640 (no AA)
Darksiders = 1152x648 (no AA)
Darkness, The (demo) = 1024x576 (no AA)
Dead Rising 2 = 1024x576 (2xAA)
Dead to Rights: Retribution = 1072x603 (2xAA) ?
Def Jam Icon (screenshot) = 1152x648 (no AA)
End of Eternity/Resonance of Fate = 1088x720 (2xAA)
Far Cry 2 = 1274x692 (QAA, black borders)
Ghostbusters = 960x540 (QAA, pre-patch), 1024x576 (2xAA, post-patch)
Godfather II = 1200x720 (blur filter)
Grand Theft Auto IV = 1152x640 (QAA)
Guitar Hero 3 = 1040x585 (no AA)
Guitar Hero Aerosmith = 1040x585 (no AA)
Guitar Hero World Tour = 1040x585 (no AA)
Guitar Hero 5 = 1024x576 (no AA)
Haze (demo) = 1024x576 (2xAA)
Jericho (demo) = 996x560 (2x AA)
Lair = 800x1080 (2xAA) - AA buffers are merged to produce 1600x1080 for further scaling
Lord of the Rings: Conquest = 640p (no AA)
Marvel: Ultimate Alliance 2 = 1024x576 (2xAA)
Metal Gear Online = 1024x768 (2xAA, temporal)
Metal Gear Solid 4: Guns of the Patriot = 1024x768 (2xAA, temporal)
Midnight Club: Los Angeles = 960x720 (QAA)
MK vs DC = 1040x624 (QAA)
MX vs ATV: Untamed = 1024x576 (no AA)
Nail'd = 1152x640 (4x2 custom edge AA)
Ninja Gaiden: Sigma 2 = 1280x718 (dynamic 2xMSAA, black borders)
Pirates des Caraibes (screenshot) = 768x1080 (no AA), 960x720 en mode 720p
Prototype = 1120x640 (QAA)
Ratchet & Clank: Tools of Destruction = 960x704 (2xAA, AA samples used to reconstruct 720p)
Ratchet & Clank: A Crank in Time = 960x704 (2xAA, AA samples used to reconstruct 720p)
Red Dead Redemption = 1152x640 (QAA)
Ryu Ga Gotoku 3 = 1024x768 (no AA)
Saint's Row 2 = 640p (QAA)
Silent Hill: Homecoming = 1024x576 (no AA)
Skate 3 = possibly 1152x640 (2xAA, super blur filter makes it difficult to determine exact res)
Sonic Unleashed = 880x720 (blur filter)
Spiderman: Shattered Dimensions = 1120x630 (no AA)
Star Ocean 4: The Last Hope = 1024x720 (2xAA, in field), ~930x512 (2xAA, in battle)
Supercar Challenge = 960x1080 (no AA)
Tekken 6 = 1024x576 (2xMSAA w/o motion blur, no AA w/motion blur)
Terminator: Salvation = 1152x648 (blur filter)
Tony Hawk's Proving Ground (demo) = 1024x576 (no AA)
Transformers = 960x1080 (no AA)
Transformers: Revenge of the Fallen = 1120x720 (blur filter)
Transformers: War for Cybertron = 1024x600 (no AA)
Vanquish = 1024x720 (2xAA)
Viking: Battle for Asgard = 960x720 (2xAA) - AA buffers are merged to a 1920x720 framebuffer, which is then downscaled to 1280x720
Virtua Fighter 5 = 1024x1024 (no AA)
1024x768 en mode 1080p 
WWE 08 = ? 640x720 ? (2x AA) - les edges ont l'aparence du 1280x720 mais d'apres certain artefact il semble que ce soit le resultat de la fusion de 2 buffers MSAA 640x720
translation StefanS: "The edges give the impression of being 1280x720p, but because of a certain artifact it seems that it is the result of the fusion of 2 MSAA buffers of resolution 640x720"
Wanted = 1120x640 (no AA)

certainly the gaming industry is 99% idiots.

Instead of offering better games we will end up in getting the same shit every year (again) and then the only thing left is making the games look better. Then the people that actually offer somewhat new experiences will feel forced to also make the visuals better otherwhise noone would buy their "ugly" games. This again will result in lowering resolutions like 600x720p so they can still say its 720p etc. And you will again get sub 20FPS games.

Todays "gamers" dont care because most of them are not gamers but mainstreamers. When most early buyers (most fanatic fans) are again outnumbered by the mainstreamers you will again see everything going down the pooper.

Cause resolution wars are more of a recent thing.

doubtful. Technically every game could be overloaded with effects and a locked 100FPS framerate to force sub HD outputs, but what's the point?

Unless there's a game aiming for 720p or 792p on PS4, there won't be a sub HD ones on X1.
Developers only started making games for next gen consoles. If anything resolution (and/or graphical fidelity) should increase starting this holiday season or next year.

If you look at game series (GTA, Uncharted, Gears of War, Elder Scrolls) they either increased their resolution with the most recent game in the series or at least hold them and still manage to look vastly superior to their predecessors.

last gen examples from Xbox360:
Elder Scrolls IV: Oblivion = 1024x600 (2xAA)
Elder Scrolls V: Skyrim = 1280x720 (likely FXAA)
Fifa 2006 = 1024x576 (2xAA)
Fifa 2014 = 1280x720 (2xAA)
Halo 3 = 1152x640 (no AA)
Halo 4 = 1280x720 (post-AA)
etc.

maybe on XB1
not gonna happen on PS4

No. The outcry would just be terrible if there was.