I just contacted LG Denmark Support today (April 14th, 2015) and they confirmed that none of the 2014 models, not even 49UB850V and 55UB850V, will get WebOS 2.0.
Luckily, I found this thread before I actually bought an LG television. I've now chosen to go with a Samsung UE55HU7505 instead. More pricey, but has 4 HDMI 2.0 ports and gets really good reviews with regard to upscaling non-UHD content to UHD content. Something we'll all be needing a lot for the foreseeable future.
Cheers,
Archfrog