After those explanations, feel free to mention the Cloud, because many people have heard that word. Alas, the Cloud means many different things. The explanation I normally use is: online data storage plus synchronization 
A more tongue-in-cheek explanation (borrowing from @starian):
Answer: Yes, just like ham and hamster.
). Better IDEs and ECMAScript.next 
are coming and should make its advantages even more obvious. Until then, being the avant-garde and not telling anyone could be a strategic advantage (I’m only half joking).
- Branding web technologies and the new HTML5 logo
- The cloud and how it changes mobile computing
- ECMAScript: ES.next versus ES 6 versus ES Harmony