I don’t have much knowledge in this area, but owning a 70mm print of a recently released film would be almost impossible, not to mention unreasonably expensive. Plus, I’d think due to the roadshows being limited, all the prints were returned to The Weinstein Company’s vaults. Plus, it’s very clear that Tarantino wants the 70mm experience to be limited to those who attended a celluloid showing. He doesn’t like video very much.
In the future it would be interesting to see whether the Roadshow version, or clips from it at all makes it to video.