This verse is the reminder that God is not just the ruler over the Israelites and those of us who trust in Him, but the God who rules over all people.
From the ancient Israelites perspective, how could His judgments be all over the earth? The answer is how do you explain how all people instinctively know murder and stealing is wrong? That alone is evidence that He exists and His judgment is all over the world.
 He hath remembered His covenant for ever, the word which He commanded to a thousand generations.
 Which covenant He made with Abraham, and His oath unto Isaac;
 And confirmed the same unto Jacob for a law, and to Israel for an everlasting covenant:
God’s has affirmed the covenant with Israel (see Genesis 35:10-15) and it will last forever. This covenant focuses specifically on the land as their inheritance. It was stated to Abraham, Isaac and again Jacob all in the book of Genesis. God’s truth is timeless and is stated by the term “a thousand generations”.
Ultimately, the land will be theirs. However, although this promise was conditional on a separate issue: obedience to His commands. If the Israelites collectively fail to trust in God, they can be kicked out of the land, which was the point of the Babylonian captivity. However, the land is theirs when they do trust in Him, which is the main point of these verses and has been confirmed through out history.