Well, there's never a guarantee for anything, but based on other stars of similar size on the main sequence, it's a nice, boring, stable star that is only about halfway through it's life cycle (and therefore extremely likely to continue to support life for Earth long after we're gone).
http://en.wikipedia.org/wiki/Sun#Life_cycle
If anything, the Sun has been very quiet the last couple of decades. It was much more active 50-60 years ago (though it's much more active than during the Maunder minimum, to be sure). But an uptick in activity isn't terribly surprising given typical solar variations.
http://en.wikipedia.org/wiki/Solar_variation#History_of_study_into_solar_variations