Totally and completely wrong... It's called a standard for a reason, that's what UHD will be broadcast in, everywhere.
"Previous UHD televisions" are simply not true UHD, that was the marketing bull, not the new logo. It's like when HD came along and everyone rushed out to buy HD Ready TV's, then came along FullHD TV's and the moaning started, same thing happening with UHD.
OLED has nothing to do with this, it's analogous to plasma vs LED, just two different approaches, both were capable of "HD" certification. Both OLED and LED TV's will be capable of true 4k.
That "standard" is very, very flexible and is driven by money. Watch and learn, the "standard" will change often with every new gimmick that's going to come along. No amount of stickers or stamps should force savvy people into thinking that they somehow have inferior products when the only motivation of those markings are to drive profits. Like I said, HDR is this years "must-have" logo-certified tech. Next year will be something else -> probably with a new logo.
both were capable of "HD" certification. Both OLED and LED TV's will be capable of true 4k.
The argument is not whether they cater for "true 4k" or not. 4k is quite easy to achieve if you stick to the correct pixel stacking method and resolution. I believe LG and Samsung had a nice war going on with Samsung's 4K implementation being accepted as the correct way of doing it in the end.
However, the argument comes with that lovely "Ultra HD Premium" logo which somehow marks anything without it as inferior. The difference between an UHD TV with that logo and without it? HDR (nits brightness max and min etc). To make things worse, some TV's sporting that Ultra HD Logo do have HDR, but their implementation of that leaves a lot to be desired (looking at you, LG). So that UltraHD Premium logo should mean absolutely nothing because it's only there to show that it supports the CURRENT gimmick of the year, which we all know will change next year.
Just because a TV doesn't have the UHD Premium logo on it, does NOT mean it doesn't have True 4K. It only means that it probably doesn't support HDR which has sweet blue f'all to do with resolution and 4K in general.
Here's a practical example: My television is a 75JU6400 Samsung LED LCD Television. Does it support true 4k resolution? Yes. Does it support HDR? No. So does it have the UltraHD Premium logo? No. But it's still a true UHD television? Yes.