AchievementHunter got to go to Toys For Bob and play Spyro Reignited Trilogy and even has an interview with the developers. At around the 25 minute mark, a question about the download came up, and when asked about it, the developers confirmed that you will be able to play all of Spyro 1 and some of Spyro 2 and 3. So that confirms the download is not a full download.