Retirement Redefined Around the country, attitudes about retirement are shifting. Share | Related Content What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. 8 Financial Lessons from the Big (and Little) Screen Financial lessons from movies and TV. Important Birthdays Over 50 Here's a look at several birthdays and “half-birthdays” that have implications regarding your retirement income.