Of course, they know they have weaker specs, but I'm also on the side that really it's all about the games and what they can bring in that regard. Just let me see the awesome software. 1.2Tf GPU vs 1.8TF etc etc I don't care about. Let me see what games you guys can bring.
You should really care because it's not 1.2 vs 1.8 tf, it is 900gflops vs 1.8tf. The Xbox one has lots of gpu resources held back for the os along with 3gb of slow ram. The system is without these issues was already handicapped. It causes potential problems when developing multiplatform games because the ideas have to be scaled down.