School districts have begun to move away from "tracking," and instead promote more inclusiveness in the advanced classes. And improving the way giftedness is identified and honored is certainly a step in the right direction. But it's important to note that gifted kids should spend their days with age-level peers for many reasons, while at the same time they should be allowed to pursue academia and their intellectual interests to their highest degree. And that can only happen in a system that maintains "gifted education." For, not every kid is going to play varsity, but every kid should be able to play.
And gifted kids should be allowed to excel, for it is in our interest to meet their learning needs, even if those needs are not "Common" or standard. Giftedness is a reality, and acknowledging and honoring it is the right approach for education.