It will definitely make the room more “live,” meaning more reflections and reverberation. How much of a problem it ends up being depends on the room – for instance, it will be worse in a large room than in a smaller one. An irregular open floor plan room improves things overall, the wood notwithstanding. Sitting closer to the speakers helps too, allowing the direct sound to be much stronger than the reflected – e.g. sitting 10-12 ft. from the speakers vs. 18-20 ft. An area run between the speakers and listening position can help as well, if things are too bad, as can things like book cases and overstuffed fabric-covered furniture (i.e. not leather).
We went from a carpeted house to wood a number of years ago, and the living room was definitely more live, but not to the point that it bothered me. I got used to it pretty quick. I decided kind of liked it, makes the room sound more like a live performance venue.
Regards,
Wayne A. Pflughaupt