If I were to explain to a lay-person, who is somewhat familiar to Salesforce, the difference between Salesforce.com and Salesforce1, without delving much into the technical aspects, what would be the best way to do so ?
2 Answers
Did you try googling you're question?
[EDIT]
This post, and this article sum it up better than I can.
The main points, boiled down are:
1) Developers can develop in any platform and it will work with SF1. Previously, it took sort-of a specialized knowledge to develop in SF
2) There's a command line that can be used to perform functions or get data and is specifically usefully and less time consuming for SF specialists and devs
3) "Committing to open source" means that the SF1 product will incorporate the best of the tech community into their product, for free
4) Integration with another cloud database company/system, Heroku, allows a broader range of data access - not just through the SF application
5) All of the SF product features will be available in mobile in SF1.
IDK - that's my shot at simplifying the explanations I've read. I could be misstating a technical detail slightly (which I guess is fine based on what you need) and I'm sure there are better ways of reducing the topic to more common language.
Hope this helps.