I honestly LOVE Halo 4 more than any other halo ever. It may be because it's the Halo I've excelled the most in though. Every other halo I was a "meh" player. This one, I can regularly rollface easily in. It's almost as if people don't understand how the boltshot works....
For the 10% of gamers who understand clockspeeds/hardware, the PS4 sounds better. For the REST of the gamers though who don't get that stuff (and there are TONS of them), they'll stick with the console that has the games they want or that their friends are buying. So when you think about it, MS isn't in a bad spot. Their console costs less to produce than PS4, sells at a higher price, and will most likely have similar sales (just look at PS3 vs Xbox 360).
Also, we look at resolution, I realized recently the casual gamer doesn't know SHIIIT about this. My friends bought 720p tvs in prep for these new consoles because they were big. They didn't even understand me when I was saying resolution, "Game looks good though!" is all they cared about.
I can see MS just playing their games at slightly less resolutions and maybe tweak the settings a bit to get the game looking pretty close to the PS4 equivalent.
By the time people can say "THis console is better than this one" definitely with actual game footage, most people will have made their decision, and other purchasers will be getting a console to join their friends.
Never underestimate how the casual gamer/user can and will purchase based on advertising alone and nothing to do with performance.
One example is AMD 64 Athlon vs Intel. AMD trashed Intel in performance in that era, and probably should have sold MUCH MORE CHIPS, but intel simply did some advertising (including some arab references...), and also said "the numbers are higher so it's faster!" and boom you come out ahead.
For us on a tech forum, performance matters a lot.
To a casual user though? It's about buying the thing your friends have and fitting in.