Unfortunately, it doesn't seem it's going to happen anytime soon as it's believed the feature is not present in Intel's current hardware. If this rumor is correct, Intel will not be able to support it until at least after the Skylake generation of products.
Supporting Adaptive-Sync would be a natural next step for Intel, whose integrated graphics processors stand to benefit tremendously from displays with a more forgiving and flexible refresh cycle. Intel's backing would also be a big boost for the Adaptive-Sync standard, since the firm ships by far the largest proportion of PC graphics solutions.