OLT
Being a flight dispatcher doesn't limit you in anyway. The expereince you gain working in flight dispatch is a solid grounding for many operational jobs, and often a stepping stone to promotions into operations management, fleet control or planning and many others. Perhaps the most important factor is the size of the airline and the nature of their organisation.
Notwithstanding the valid comment regarding the FAR's made by bcp7 and BelargUSA, flight dispatch it is by no means a dead end job, quite the contrary.