avus17: Would a new BeoVision 7 40'' be more future prove with new MeoSystem 3 and Blue Ray player?
Absolutely nothing is 'future proof'. How can it be? The future is indefinite.
If you're happy with the BV7-32, why upgrade? Of course there will be a massive difference between a MK1 BV7-32 (which I used to own) and a BV7-40 MKIII or the forthcoming MKIV.
However, if you read the forums, there are many people who think Blu-ray is on a slippery slope, which means that the future of this technology isn't proved.
Only you can make the decision if it's worth upgrading.