Why have Samsung and Sony suddenly developed delusions about their projectors being Oled replacements? Or that they invented something new? UST projectors have been around for over a decade...
No current projector tech is capable of anything close to Oled performance. The very best projectors are capable of producing a nice image in a pitch black room only. Nothing has changed in this respect.
All current projector tech including LCOS, DLP and LCD has poor contrast. They require wire-grid polarizers and a dynamic iris to generate a convincing black.
Oleds light pixels individually over a jet black background. They're capable of massively superior contrast and black to any projector even with the lights on.
Projectors have a place and that is for 120"+ screens but they'll never be Oled replacements unless a whole new tech is invented.