Confirmat
http://www.thesixthaxis.com/2014/10/...ing-this-week/
GTA: San Andreas on the Xbox Marketplace will be available again for purchase beginning October 26th, 2014, through Games on Demand. This version features 720p resolution, enhanced draw distance, and Achievement support.

UPDATE: Some members on NeoGAF have noticed that the Classics version has been pulled from the Xbox Live Marketplace. A similar thing happened with the PSN version, suggesting PS3 will get the new game as well.