This is exactly why you should play with a high DPI, but the benefit is diminishing. By that I mean there is not much to gain going from 6000 to 8000 DPI (although it is in theory smoother), but going from 400 to 2000 is huge in terms of smoothness. It also depends on your 360 distance/ratio though.
Increasing DPI while maintaining the sensitivity is actually why this calculator was created in the first place. In some games the sensitivity scales directly with the DPI, so if you're doubling the DPI, you can just half your sensitivity. This is not true for all games though (like BF 3, 4 and 1).