Yeah I'd bet this is going to go anywhere. There's chemical receptors in your tongue, nose, and even gut that communicate the chemical makeup of something to your brain. And the reason that whipped cream tastes good is because the chemical makeup includes fats and sugars, which you're not going to replace with thickening agents and milk protein.

A better idea would be to understand why, or rather what, sugar and fat are bad for you and simply substitute them. Low glycemic index sweeteners would cut heart disease without any loss in taste, and dairy fats don't appear to have much affect on heart disease or the possible neurological effects fats can have. If they'd just make whipped cream with coconut sugar you'd have a relatively healthy substitute already.