As Jasondtx mentions, many films utilize digital effects. It kinda makes sense to shoot digital if the movie will require efx, because once shot on digital, the movie exists in a compatible digital file format so everyone in the post-produciton process can access the elements, do what they need to do, then all the efx (color-correction, digital effects, digital compositing, etc.) all get added without the need to go back to film. The post process is essentially seamless. Even when Film was used, the digital post process was done in either 2K or 4K, with 2K being the norm because 4K was so expensive. Then whatever was done digitally, was transferred back to film so it could be edited back into the film. If you were paying for a feature film, wouldn't make sense (cost-wise) to shoot digital, do all post work digitally, then add digital post effect back to a digital-based film? All work stays in the digital world.