"Comming Soon" what does it really mean?

In the past year there has been a growing number of store fronts sporting signs stating "Coming Soon".  What exactly is the length of time associated with "Coming Soon"? I guess it depends on who is making that statement.  After a massive fire Yamaguchi is said to be coming soon to a new location on the same block. It's been the better part of one year and the vacant store front has seen no renovations.  The eagerly anticipated Gyro restaurant is said to be "Coming Soon" to the location once occupied by India Gardens.  That sign went up this past summer. A Mexican Grill is said to be "Coming Soon" to the site that was formerly Twisted Yogurt. Then there is the New Car Wash which for a year was said to be "coming soon", but it did eventually did open for business.  Still almost all  of the mentioned businesses do not have an actual "Coming Soon" date.  Imagine telling your utility company the check is "Coming Soon" and then they receive nothing for over six months. Will someone please explain what the term "Coming Soon" actually means.