Dive summary:

• Once upon a time, saying "senior" was enough to begin laying plans for market-targeted housing, but those days are gone, according to an Urban Land Institute report.
• The over-65 crowd segments into the Greatest Generation (85 and older and living longer than any cohort before them), the Silent Generation, (people now 67 to 85) and Leading-Edge Boomers (those newly arriving at 65).
• Taken together, they totaled 40.3 million in 2010 and will grow 36% to 54.8 million by 2020, but they will have differing needs that they will want met in different housing situations.

From the article:

"Leading-Edge Boomers will not settle gracefully into quiet retirement and move into traditional seniors housing communities for years, if they ever do." ...