Depends until people actually play it
It's a given that this is not going to look absolutely bang up to date - its been through far too many development changes for that. It's also probable it will have gameplay similar to older games.
What really matters is if it is fun, for the Duke audience. It's unlikely to make the same splash as the original did either technologically, or in gameplay, but frankly in retrospect Duke 3D was good, but not one of the all time greats.
Then again, I could say the same about Quake. Fun at the time, impressive technically, but far too brown, lacking in storyline, humour and a coherent game world.