Oakland, I'm sure the examiner of the Sangamo patent application will reference the Editas patent, but we really can have no idea now as to what if any Sangamo claims might be granted and what litigation will follow. Patent office actions are very hard to predict.
Another interesting date in all this is April 15, 2014, the date when the Editas patent was issued. Because that is within one year of the filing date of Sangamo's patent on May 15, 2013, there could be a patent interference proceeding to determine precedence.
By the way, I am not a lawyer, although I have been involved in writing patents and shepherding them through to approval.