speech ideas, anyone?

I've been asked to give a speech next month at my local Rotary club, and I accepted without thinking. Now, on top of worrying about correct Japanese, I'm also agonizing over what I should speak about! I've been informed that the "members are the top of the bank, TV, newspapers, and other territories in Matsuyama," which leads me to believe that I will be addressing rather eminent men who are rather advanced in age. It's been a long while since I've had to address an audience that wasn't my peers, and wasn't about my research or some sort of fixed topic. In fact, I can't remember if I've ever done that. I'm at a complete loss. I don't want to waste these people's time, but I can't think of something they might find worthwhile to listen to, coming from someone like me. I have the quaint notion that speeches ought to be educational somehow, but what could I possibly teach them? Some have already had their formative study abroad experiences when they were young; for the rest, I can hardly advocate it as it's a bit impractical while not in school!
Speeches can also just be entertaining and funny, but since that's hard enough in English, I won't even attempt it in Japanese. I don't understand Japanese humor as yet...maybe never.
I can talk about my experiences of Japan--but even if it is from my viewpoint, something I consider to be wondrous and cool will just be everyday and boring to them, most likely. Or I could talk about the US, but what's to talk about really? Again, it's not like these businessmen have never been abroad.
I want to be somewhat educational and enlightening without sounding moralizing and preachy. And without spending tooo much time encouraging them to donate money to Fulbright (which I definitely will put in there, subtly, somewhere near the end).

Some thoughts so far:
Maybe a thoughtful treatment of what it means to have culture. Visible vs invisible culture, how I find it so fascinating how visible Japanese tradition is (shrines, architecture, kimonos, theater) and how that's made me evaluate American culture, which was something I considered basically didn't exist or was invisible in some way. It's certainly not as old, but instead of kabuki and noh we have musical theater, opera (not strictly American, but of a Western tradition nonetheless). Instead of oden and tako-yaki, we have french fries, hot dogs, burgers. And we have baseball, which I'm not into, but is nothing if not American. But we don't go around dressed in colonial wear much. I suppose colonial-ish architecture is still around...some cathedrals, as well...Why does it feel different? So yeah, I have nothing much insightful to say on this topic yet.

Cultural appropriation. I got asked, "You have Disney in America, right?" (Person in question thought maybe it was of British origin). I'm sure if I tried to remember harder, there were other examples of people being surprised that something was American in origin rather than Japanese or from some other country.

Something about encouraging people to take breaks. The wonders of rejuvenation. Don't discourage your grandkids from taking years off to do something interesting and worthwhile in the middle of their studies. It sort of devolves into taking risks, getting outside of one's comfort zone, finding a real-world passion, combating arrogance, developing empathy, broadening horizons, all kinds of other cliche preachy stuff. :-\

That's it, no more ideas. What would these people be interested in hearing from me?
Oh, and apparently, Powerpoint is okay. That poses a whole other problem like, what could I put in a Powerpoint for this kind of a speech? hah.