However, #1 for me is not quite right. Selling before building anything may backfire as your prospects could see you as an airhead selling vaporware. "OK, this tech looks useful, but so is anti-gravity. Show me that it is buildable and that your team can build it quickly."
One way to allay such concerns is to have a quick prototype that (on a logarithmic scale) is halfway to the product you are selling. This can say "yes, we do not have a product for you today (because we did not focus on it yet), but we can build it quickly". Would this be something you are interested in? My 2c.