Someone will cater to the market for smaller OLED screens eventually, I'm not in a hurry. Maybe when someone starts making monitor-sized OLED panels and gets costs down that'll solve the problem.
The questions though are (1) who, and (2) what's in it for them?
Look at the manufacturers left in the (European) TV market. You've got the four majors: Samsung, LG, Sony and Panasonic. All of them had a go at developing OLED. Only LG had the combination of the will and the resources to stick it out. Samsung went its own way with QLED instead. Panasonic and Sony now buy the LG screen panel for their own TV development. Finance wise, Sony and Panasonic's TV business is in pretty poor shape. They haven't got the money for such a gamble.
LG competes with Samsung's QLED product with its own Super UHD LED TV range. I can't see much of an incentive for LG to throw a load of cash at small OLED production when they're busy trying to recoup the huge investment made just to get OLED off the blocks.
Who does that leave?
Vestel, TPV, HiSense etc...... the manufacturers who put other peoples badges on product they make under license.
TPV is the name behind Philips, and they already use the LG OLED panel
HiSense is interested in growing its volume TV business, and that's why it bought Sharp's factories in continental America and it has just done a deal to produce Hitachi in the US too. The Sharp deal is mired in legal wranglings though. I can't see them throwing a heap of cash at smaller OLED TVs.
That leaves either the minor players or Vestel. That's a company that planted its flag in OLED territory back in 2015, but so far, apart from showcasing some products at the major trade events, TTBOMK there's yet to be any movement forward to have some retail product. They did show an OLED at IFA (European trade show, Sept 2017), but it was a 65" panel.
That takes care of the "Who?", so what about the "What's in it for them?"
Of the existing manufacturers, Vestel is possibly the strongest known candidate. However, their forte has been undercutting their rivals rather than forging new markets. A small OLED would be a high-value niche-market product with no direct competitor ranges to price against. That's not where Vestel have been to-date.
What about the PC market?
The laptop screens market is a graveyard as far an new OLED offerings for 2018. There's some tablets I think with OLED, but that's the printable version which maxes-out at 40x50cm AFAIK. We know the story about Dell. So, for anything involving a static image then OLED has a bit of a problem.
Can anyone here see a way forward?