Curiosity should last a very long time - up to around 14 years.
My question is whether NASA has any plans for a Mars rovers after Curiosity. If so, are any specifics known?
Nasa is planning another rover for a 2020 arrival. To keep costs down the plan is to use a chassis similar to Curiosity but with a different set of instruments.
NASA's Science Definition Team issued a report earlier this month outlining four major goals for the mission:
Explore an astrobiologically relevant ancient environment on Mars to decipher its geological processes and history, including the assessment of past habitability.
Assess the biosignature preservation potential within the selected geological environment and search for potential biosignatures.
Demonstrate significant technical progress towards the future return of scientifically selected, well-documented samples to Earth.
Provide an opportunity for contributed Human Exploration & Operations Mission Directorate (HEOMD) or Space Technology Program (STP) participation, compatible with the science payload and within the mission’s payload capacity.
Concept Sketch for new rover: