Generational differences at work might just be a cliché

"I see no hope for the future of our people if they are dependent on the frivolous youth of today..." (Hesioud, 8th century BC).

The perception of generational differences at the workplace is likely as old as workplaces themselves. However, research evidence accumulates that generational differences are more likely stereotypes than actually existing differences. A study from the USA concluded that stereotypes serve as shortcuts for understanding the environment, and shortcuts are welcome in a busy world. Overall, however, there is no solid theoretical or empirical evidence supporting generationally based differences at work.

Constanza, D. P. & Finkelstein, L. M. (2015). Generationally Based Differences in the Workplace: Is There a There There?. Industrial and Organizational Psychology, 8, 308-323. doi:10.1017/iop.2015.15

Generation Gap might be an important resource for companies

Older employees may be more resilient workers and able to help younger colleagues rattled by the economic crisis, according to a study by the Center on Aging & Work. While employees generally report a declining engagement at work in times of financial hardships, older workers were more resistant against such hardships compared to younger employees.

Pitt-Catsouphes, M., & Matz-Costa, C. (2008). The multi-generational workforce: Workplace flexibility and engagement. Community, work and Family, 11(2), 215-229.