Connavar - SF can be hard for casual readers; about that, I disagree with you.
The SF works that are easy to digest tend to be ones that are slight extensions of current trends, which usually means near-future - and works that are really of another genre entirely with a thin plating of SF goodies ("Westerns with blasters" for example).
The difficult ones are those that indulge in cutting-edge speculation, or perhaps play around with something really basic in human nature and see what happens. Examples: virtually anything by Greg Egan in the first category, Ursula LeGuin's "Left Hand of Darkness" in the second.
Just my opinion, natch.
Just what constitutes a near-future SF story as opposed to, for example, a technothriller is a matter of definition - and of marketing; for example, Dale Brown's stories centreing on advanced experimental weapons systems are not marketed as SF and the reason is at least partly because if they were, they would sell fewer copies. Quite a lot of people avoid anything marketed as SF.