1914 is still considered to be the end of the Gentile Times and the beginning of the last days. It seems that the date will continue to be used as a starting point for the time of the end, but will no longer be used to either calculate or approximate when the final end will come. The end will be "near" indefinitely.
This is similar to what the Adventists have done with Miller's date of 1844. William Miller was disappointed when Jesus did not return visibly in that year, but the Seventh Day Adventists claimed that it was the beginning of the "investigative judgment" and that the end has been "near" ever since. So it looks like 1914 will be the JW's 1844.
I believe we have an Adventist who posts here, and could fill us in on more details if so desired. But the point is, the JWs have a start date with no finish line in sight.