A study reports enhanced attentional resources of action game players:
This work further documents the enhanced attentional resources of action video gamers and establishes faster reaction times in that population without a notable loss in accuracy. These effects were seen throughout the age range studied suggesting similar effects of action game playing from the early school years through to adulthood. While causality can only be inferred with a training study, the findings are in accord with attentional changes that have been previously trained in NVGPs using action video games.1
Study also site several other studies showing similar results.
Notes
- Dye, Green & Bavelier (2009). The development of attention skills in action video game players. Neuropsychologia 47(8-9), pp. 1780-1789, http://dx.doi.org/10.1016/j.neuropsychologia.2009.02.002.
Petri Lankoski 
This study report by enhancing attentional resources of action game players, has affirmed the fact that video games are not just a time pass, they are very useful also.