Just as a general clarification to all:
When the term "futureproofing" is brought up in relation to this topic, the term is only useful if it is being applied to the question of content availability, as in "If we get much more 1080p content in the next few years, a 1080p panel might make better sense for me because my seating distance is often close enough to the screen that I would benefit from the panels higher resolution capability", as opposed to the term being used in the context of "Oh no, I'll be stuck with a tv that cannot play all this new 1080p content because it's only 720p or 768p!"
The former hypothetical quote is the correct question to be asking yourself, vs. the latter hypothetical, which is totally erroneous and NOTHING AT ALL to be concerned about. In this second scenario, you'll still be able to play all 1080p content, but your panel will scale down this higher resolution to match your panels own native (i.e. inherent or built-in) resolution.
Whether or not this second scenario will be a noticably downgraded viewing experience for you will once again revert back to the all-important question of your screen size in relation to your viewing distance, and perhaps, your panels ability to scale other resolutions. (See the chart I've linked to in the very first post for your review).
And then, even if you are able to appreciate the difference from your typical viewing distance, how much more are you willing to spend for the amount of difference you see? These last two questions can only be answered by you and you alone. Well, you and any significant others.