Don't hold your breath!
I emailed LG twice this last month asking about whether a smaller OLED was due 2020 and here is my response after finding out that they had no plans and their follow up email. Got to say I'm disappointed that nothing is planned but full marks to LG for keeping me informed.
M: It’s quite confusing as most the AV forums, WhatHiFi etc. all state that LG are definitely going into production on smaller than 55” OLEDs in 2020 in either 1st 2nd or 3rd quarter. I don’t have the space for anything bigger than a 50” but obviously wanted the latest technology. Currys and John Lewis say they are always been asked by customers for 48-50” sizes!
I will just have to make do with LG Nanocell or QLED or Sony if you are sure there is no chance of LG producing in 2020. I would obviously be very miffed if I get what I consider 2nd best old technology and then LG change their minds!
Is it worth asking the question again of your South Korean colleagues in Guangzhou or Paju?
LG:
The sizes of OLED TV’s is something we raise to the team pretty much every year.
Currently it seems that if we was to produce a smaller size for example a 49 inch the cost would be the same as the 55 inch. With this product and its cost customers often want a large size to justify the cost. This is similar to some technologies we are used to now days which back in the day were simply not cost effective to use for smaller size screens.
At this time like Chloe said we have no information stating that LG plan to release an OLED smaller than the current range as part of our 2020 releases.