The eschatological aspect of the Tree of Life
The point that Vos and other Reformed theologians make is that this imagery of the tree of life that you find in Genesis 2:9, this imagery reappears at the end of history in the book of Revelation in a consummate and glorious context, a heavenly context where Jesus has been raised and glorified, and shows us that this tree of life imagery in Eden, actually finds its fulfillment in a consummate glorious heavenly context, and it does so because Jesus has been crucified and raised, and he brings what is symbolically present in the tree of life to its heavenly climax and conclusion. Jesus obtains that immortality and higher life and heavenly life that was promised to Adam.
Lane Tipton, Eschatology: the Big Picture, Westminster Theological Seminary, 2004