OK, so V1 can never be greater than rotate speed (after that, it's irrelelvant as you'll be flying). But at rotate speed, given sufficient runway length remaining, surely the power could be pulled off, reverse selected, and the brakes used normally (not agressively) to bring the aircraft to a gentle stop.
Most runways in the real world are not long enough to allow that, hence my assumption that V1 takes into account available runway length. Does it?
In the 'infinate runway' scenario, wouldn't V1 always be rotate speed, and therefore not relevant as a descision speed?