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I haven't paid that much attention honestly, lately at least, to the half-life for the in production LG OLED. They're using color filters, unlike the route Samsung took, so I don't see half-life being that much of an issue. You would have to watch a lot of TV for a long time before you'd hit that mark - think 8 hours per day, each year, for 10 years, to get to 30k hr. Even if you are doing that, in 10 years, if the TV isn't meeting your needs, think what will be available then (well, lets hope LG sticks with OLED at least and doesn't abandon it, and we're all stuck with shit LCD <shudder>).
If you can wait until 2017 models have lost intro pricing, I've got to think those are going to be some really stellar TVs. Heck if the 2016 solve the issues, and don't incorporate new ones of their own, and include HDR (which they should) and HDMI 2.0a (which they should, hopefully), those right there should be pretty awesome TVs.