GMAC has finally announced the revised date for the upgraded online exam. See the official statement below, but the short version is: Curren version will continue along for another month, but you can sign up now to get a significantly improved at-home experience:
My big question is about testing limits. Currently the GMAT can only be taken 5 times in a 12 month period or a maximum of 8 times in your life in the test center, but this is entirely separate the at-home/ online version that you can twice.
As the two exam experiences become more similar, I wonder whether these limits will eventually be merged or whether they will continue to function separately.