To the gentleman saying you can only use one bullet at a time so why need variety:
Nothing worse than building your rifle around a bullet and then you can't get it to shoot. Variety is the spice of life, the .277 bore diameter doesn't have enough to draw me away from 6.5 and 7.
There are those on this forum who dislike Hornady and say their rounds don't do anything new. Unlike other companies (think remington with the 260), they support their rounds. The round, chamber, twist rate, and sometimes new bullets are all designed together to work and the factory offerings shoot very well. The bullet designs are modern and purpose built as well. Sure you can build a fast twist 22-250, 243 or 270, but most people are shooting factory rifles with factory ammo. For them the 22 creedmoor, 6mm creedmoor, etc are much more realistic choices.
If this round is a revised 270 WSM with the right twist rate, it seems like a day late and a dollar short to me.