My husband is diabetic, just recently diagnosed. The diet modifications can be made, but it's not easy. I agree with you that the low-carb products that are out there have made it a lot easier. I don't think they'll disappear altogether, but it will make a difficult situation more so.
Thank goodness for Splenda though. He is able to eat frozen snacks that are made with Splenda without exceeding the number of carbs he's allowed.