QGP or not QGP?

In this talk I address the flowing questions: What is the role of the initial state effects versus the final state effects in nucleus-nucleus, proton-nucleus and proton-proton collisions? Is thermalization possible in these collisions? Can we use hydrodynamics for description of small systems? Can we observe saturation and low x evolution at the Large Hadron Collider? Is the ridge a saturation phenomenon or a signal of the hydrodynamic evolution?