Modern day zeppelins are filled with helium as opposed to the highly inflammable hydrogen used back in the 1930s. Zeppelins can also stay up in the air for very long periods and though not necessarily important, it's a lot more spectacular taking a zeppelin than your regular bus or train southwards on a sunny holiday. Rigid Air Design maintains that zeppelins are THE solution for the increasing transport problems in The Netherlands and says they are a lot cheaper. However, skeptics point out that the disadvantages outweigh the advantages. The infrastructure to and from an airport must be suitable to process large numbers of traffic.
Airplanes still fly four to five times faster than zeppelins.
Trains and buses are more flexible because passengers can board en route. Newer and faster express trains are on the way, a modernized European air traffic control system is on the drawing board and airlines are launching larger aircraft to accommodate more passengers and freight. Moreover, a zeppelin's flight plan is wholly dependent on weather conditions because airships can't fly above the weather like air planes. This means that arrival time at destination x will differ from day to day. With this in mind, exporting vulnerable goods such as flowers, fruit or vegetables by zeppelin doesn't seem feasible.