All things are possible, but through time. In the 19th century technology growth has equaled the 18 centuries before combined. The 20th century has equaled the 19 centuries, and they predict that the 21st century will equal the first 20 centuries.... So it may be here quicker than one would think. Eventually, they will be able to produce donor bodies through stem cells and 3d printing, and transplant your brain or download your conscience into said bodies. Then with (manufactured) they could make you young again, shorter or taller, possibly make you genetically and physically the sex that you wanted, with fully functional organs