Unfortunately, it’s only 621 miles (1000 km). If this new battery is for a hybrid with a smaller gas engine than the Prius then the government-subsidized Chevy Volt sales are going to get worse. If, however, this battery is for a fully-electric vehicle, it will be a game-changer. Fleet sales may become more viable.
That's still a greater range than typical for current cars. My Camry gets about 450 (+/- 20) miles on a full tank.