LHC potential for Standard Model Measurements

I review the potential of precision measurements at the LHC. I argue that total cross-section measurements will soon be limited by systematics; instead, differential cross-sections will constrain the theory much more efficiently. As an example, measuring the Z rapidity distributions will allow to reduce the uncertainty on the high-mass Drell-Yan spectrum, provided we can identify leptons as forward as possible. Similarly, the W distributions can be deduced from the Z ones, largely reducinging the uncertainties affecting the W mass measurement. For this analysis, I argue that an ultimate precision of 5 MeV should be within reach. This number sets a goal of 500 MeV on the top mass measurement.