Where did you read that?? There has been no announcement and as far as I know it is not policy to announce releases this far out due to regulatory requirements....
Tom Hogarty has stated that for the foreseeable future Lightroom will be available with a perpetual license and I would read this as the foreseeable future. Lightroom has been able to be upgraded from more than just the prior version so again I see no reason you won't be able to do what you want when Lightroom 6 is released, whenever that may be...
I've read that LR6 will be out in March 2015.
A much-repeated, completely unsubstantiated rumour, I'm afraid.
John Waller wrote:
Parts of the rumour mill are in overdrive
Love it John..... is this likely to be the second coming as Christiantoday.com not only tops the search but features more than once or is it a God only knows thing????