Check out this interesting video guys, which will tell you what's under the hood of PS4 Neo. Will you be purchasing one on release?
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probably not at launch if at all. Will have to see if it actually improves graphics or not as one of the videos stated that it won't improve the graphics but mainly improve framerate. However at this point people are all pretty much guessing what it will & won't do based off what the specs should be capable of doing.