The Free's are not being discountinued as a concept - maybe a particular style / model could be.
With regard to the Skylons, they do incorporate some learnings from Free (in terms of flexibility and permitting more natural motion), however they are not classed as being part of the Free family.
This is because they utilise the learnings of Free to enhance the performance of the shoe (and therefore you), not to improve the conditioning of the foot.