If science can someday secure immortality, would that affect a person's values and morals?

Imagine that scientists discover how to keep our bodies forever young, that all diseases were prevented or cured by nanotechnology, and that we could withstand massive amounts of physical force, virtually all extremes of temperature, and all forms of radiation to due to robotic and genetic enhancements. Imagine, in short, that a person could only die by being sucked into a black hole, but that would never happen because we know where all of them are and could easily avoid them. Would this change anything fundamental about human life, particularly about ethics? Given that the Objectivist ethics is founded on the conditionality of life, would and should virtually immortal people still pursue their happiness and other values? Would ethics have to be redefined or put on a new foundation?

[Edited by Diana]