The plan, as stated at the December 2018 annual meeting, is to replace the sofa beds at all
DVC resorts with the Murphy pull down beds from the wall, likely on a schedule that has it done at each resort when the resort undergoes a full (not just cosmetic) refurb -- that could still be a lot of years away for a number of resorts since a full refurb is something that is suppose to occur about every 14 years (but there has been mention it could be moved to every 12 year; the cosmetic refurb occurs halfway between the complete refurbs). Someone has mentioned the beds will not be added to OKW because apparently it cannot be done there because of the nature of the walls, but OKW was not specifically excluded from the generally applicable announcement at the 2018 meeting.
Riviera has been getting them as the new resort. SSR is currently getting them as part of its full refurb, which has actually been delayed by the Covid problems, and is now only partially complete. BRV was supposed to start such refurb in 2020 but, as far as I am aware, that has not started yet. Following BRV, the next full refurb is supposed to be HHI starting in 2022.