As we've seen, there are clearly two camps forming on this issue, but I hope both will continue to fight, even after the September discs are out, for a proper DVD release of the OOT. I recommend those that buy the discs in September lend their support to the SE disc return.
Also, if you were meaning your question in the sense of "is there any point to keeping VHS copies after buying the September discs?" then I would have to say that they are not likely to appreciate much in value, so it would be purely for your own nostalgia!