It should make an impact as long as it's no more than the current price of the Xbox One ($299) simply due to it being a new model; Some current Xbox One owners will upgrade. Some who want a 4K Blu ray player will buy it if it's that price too. This is also outside of the fact that Gears of War 4 will more than likely have a console bundle with a slim model.
So yeah, it should do well as long as it's not over $299.
I remain doubtful about price being at 299 with 2TB drive - usually they put in larger drive to add more value to more expensive package.
Obviously if they do $299 it will be a good price for the package.