Their engine was designed to be cross- gen. I'd temper my expectations for most of destiny because even if they go current generation only it'll based on what many would consider an out of date engine already. The 10 year term is the estimated engine lifespan. Destiny is based in a halo reach to now development lifecycle which unfortunately puts it as more a last generation engine with current gen compatible. My expectations for destiny and even destiny 2 are very tempered and I'm skeptical if it will ever be the game everyone was hoping until they develop an engine built for current generation systems. Bungie put it in the light that past generation limited their efforts rather than admitting they programmed themselves into a corner with a cross generation model. Now the community with tear itself apart for a while. Hopefully everyone will take this a realize how limited destiny actually is