[One (M7) General] hamdir:
Here are my my early conclusions about the HTC One gaming videos and general hardcore gaming situation

Regarding frame rate and performance:

Previous HTC devices had issues with their ondemand governor, we have confirmed the One still uses this governor by default (due to HTC constant war with battery)

however this problem was greatly exaggerated on the HTC One X, because the GPU on tegra 3 scale dynamically with the CPU, so whenever the CPU dipped on the One X it caused massive performance hit, it was near essential to root and change this governor or tweak its values in order to game properly on the One X

Judging from the videos, although we do see some fps drops, the situation doesn't seem to be severe on the HTC One, still hardcore gamers should root and switch to the Qualcomm's MSM-DCVS governor included in the HTC One, this a performance governor optimized specifically for quad core krait chipsets and can scale dynamically between high performance and low power use, more info about this here

Now regarding visual quality on specific games:

- Real Racing 3 is running very smooth but we can see developers are dropping out effects in order to support the 1080p screen, for example this game seems to be running in either low or medium mode (as evident by the non realtime reflections) on the iPhone, iPad, SGS3 and Note 2 it runs in high mode with realtime reflections, however it can easily be patched to run in full, more info here

- Modern Combat 4 it's running in mode 1, reduced effects, particles, texture quality and polygons, just like Tegra 3 devices it runs in 60fps with this mode, on the SGS3 and iPhone 5 it runs in full quality mode 2 which is dramatically better looking, it can be patched, more info here

- Batman Seems to be smooth and running in full quality

We also saw Asphalt 7 running on the HTC One in the Verge video review, running very smooth but with all effects off and very low texture resolution, it can be patched, more info here

These game are running very similar to the Xperia Z configurations we saw in here, game effects and quality are being dropped in order to compensate for the 1080p screens

With the exception of Nova 3 and NFSMW which are running in full modes with some lag on the Xperia Z (probably due to their configuration on the Nexus 4)

many games can be patched to run in full effects, but it's a hard and exhaustive process, especially when you have to repatch, whenever a game gets updated

Conclusion:

All our concerns about Qualcomm game support and 1080p screens are well founded, historically Qualcomm GPUs were always very strong but game developers neglected them and instead focused on the big players like Samsung and Nvidia, although Qualcomm promised to improve this support and indeed we saw this improvement on the 720p Adreno320 devices like the Nexus 4, we now took a step back because of the early 1080p adoption, judging from the MWC 2013 coverage, Qualcomm seemed to be more concerned with games actually running smooth at this extreme resolution instead of the state of visual quality

Bottom line, don't expect Apple, Samsung or Tegra level of game support, games will look inferior compared to iDevices, modding and custom efforts will be needed