Pinches of salt at the ready, folks. According to the latest speculation, Microsoft's sequel to the Xbox 360 will actually be two models, a pared down set-top box for casual gamers and a heftier model for the hardcore. Either way, Xbox 720 / Xbox Loop's getting paired up with a revised version of the magnificent Kinect hardware. The digital grapevine's saying that Kinect 2 will be able to read your lips, track your fingers and sense the tone of your voice to determine if you've come over all …