No, its never going to happen. The Florida State Capitol will be staying in Tallahassee where it belongs. And moving it Orlando is an even worse idea than many of the other proposals of both the recent and long past.
Orlando is struggling to keep up with its current growth and is currently in the middle of a major upgrade of Interstate 4 and many other infrastructure upgrades. The last thing it needs is more growth, particularly growth that would be concentrated in the downtown and older inner city neighborhoods. Orlando would be a horrible location.
Yes, Tallahassee is remote from the center of population of Florida, but this is 2019, and Florida has a part time legislature that meets only two months out of the year, so travel back and forth by legislators is limited. Modern technology limits the need for people to physically travel to the Capitol to transact business.
And moving the Capitol out of Tallahassee would devastate Tallahassee and Leon County. Florida State University and FAMU, while substantial institutions, are not nearly capable of sustaining Tallahassee, if the Capitol and all its work force suddenly disappeared.
The Capitol is not moving and people need to stop wasting time by repeatedly bringing up this idea which has been rejected time and time again, most notable in 1967 when the modern Capitol Building was built in response to an attempt to move the Capitol.