The hurricane remains a great distance from Cancun and has a potential impact along an arc of Central American/Mexican and US Gulf Coast about 2,000 miles long. Add Caribbean islands over which it may dissipate much strength (and the fact that its current status is modest and there are no guarantees that it will intensify to major status).
Every year, the season brings Atlantic hurricanes, and though we are far better equipped today to forecast tracks and potential strength, the harsh reality of this situation is that Cancun is a no more likely impact zone than are New Orleans, Kingston, Brownsville or dozens of other places.
Sadly, Sunday will tell you little more as to actual conditions, maybe enough to make a judgment call, but for the moment pack your bag, find your Ziploc and prepare to go. We've all become so sensitive to the media's shock tactics as to have forgotten that nothing is without risk, but the risk that a hurricane will pick out your hotel to strike remains quite modest