User Activated Soft Fork (UASF) of Bitcoin is scheduled to activate On 1st August 2017, It is intended to address scaling issues faced by the Bitcoin network by accelerating the adoption of Segregated Witness.
The activation may create two blockchains. Should this occur, there are two likely outcomes:
I) One blockchain becomes dominant, resulting in the other blockchain having low community adoption and value.
II) Both blockchains are adopted, co-existing and operating independently of one another with roughly equal community adoption and value.