Yeah, that was my plan since Samsung components and remotes all integrate together so well. Anyways, the Sony 4K player just arrived last night, so I'll hook it up this evening and see how seamless (or not) it is.
Sounds like the sound bar defaulted to eARC so you should be good. Plug and play. At most, you might have to toggle on eARC for the 4K player's specific input. If you're not familiar with eARC (enhanced Audio Return Channel), it's the way the TV sends audio back to the sound bar via HDMI cable. With eARC, audio signals sent to any TV input are rerouted to the sound bar rather than played through the TV speakers.
As for the player, some don't detect to HDR/Dolby Vision video capability (presuming your TV is so equipped). They sometimes don't detect 4K display capability, either, defaulting to some lesser resolution. You might check both settings to be sure.
Also be prepared for 4K discs to have longer load times. I've had them take anywhere from 20 second to almost a minute depending on disc menu complexity.
Finally, be very careful handling 4K discs. Spindle hole and edges only, please. 4K blu-ray data density makes discs hella sensitive to surface imperfections - scratches, smears, smudges, etc.. Wiping your booger hooks all over the disc is a surefire way to get read errors.
*edit to add* Once you get the player working and connected to the interwebz, do a firmware update. Probably in your "System" settings. Usually only takes a minute or two.
Brad