The more Curiosity finds the more likely there will be further missions to the solar system. At the moment NASA's schedule is looking fairly sparse. This Mars rover is due to last 98 months, it could go on for longer, but, bear in mind, it is very sophisticated and possibly more prone to malfunction. New Horizons will say Hi/Bye to Pluto in 2015. The Dawn probe will have reached the end of its official mission by then as well. The Juno mission to Jupiter is expected to finish by 2016. Unless there are more probes planned now, there will be no more (NASA) missions for the forseeable future. The ESA has a probe going to Jupiter, due to arrive in the 2020s.
Humanity is now the biggest factor shaping the planet Earth. We use more energy than all indigenous natural processes combined. Welcome to the Anthopocene. Our future is in space. We have outgrown the Earth in the same way we have outgrown capitalism, i.e. without successfully replacing these systems. Part of getting through the next hundred years with civilisation intact will be colonising the solar system.