What does Genesis 27:37 mean?

Esau is distraught at learning that his younger twin brother, Jacob, has stolen his blessing. Isaac, their father, intended to give this gift to Esau (Genesis 27:1–6). His wife, Rebekah, plotted an elaborate disguise for her favored son, Jacob (Genesis 27:15–17), which fooled the elderly, blind father into bestowing it on the wrong person (Genesis 27:33–34).

In the previous verse, Esau asked Isaac if he had not reserved some blessing for him. It was not uncommon for a father, near death, to confer a blessing on more than one of his children, dividing his well wishes or predictions for their future. In Isaac's case, however, he had planned to give to Esau all the blessing he had to give. In truth, Isaac had not reserved a blessing for Jacob. He loved Esau so much more that He had intended all of the family blessing to go to him (Genesis 25:28). God, however, had planned all along for Jacob to rule over his brother (Genesis 25:23). It was not merely Jacob and Rebekah who had thwarted Isaac's plan. Beyond the question of this particular blessing, God Himself had already planned to make Jacob the heir of His promises.

Now Isaac reveals to Esau exactly how he has blessed Jacob. His words reveal how powerful Isaac believes this blessing to be. With a few words of prayer, Isaac says that he has made Jacob lord over Esau and all his brothers and that he has sustained him with grain and wine. Of course, Isaac's prayer made clear it was God who would do these things in Jacob's life.

Given that context, what meaningful blessing could be left to give to Esau?