Peculiar velocity surveys offer a unique way of understanding our cosmological model and testing the nature of gravity. In this talk I will give an overview of how these can be used, focussing on recent constraints from the 2MASS Tully Fisher Survey and plans for future surveys such as Taipan and LSST. In particular, I’ll finish with predictions for how peculiar velocities measured with Type IA Supernovae from LSST could far surpass current measurements and offer an unparalleled test of gravity on large scales.