Is Justice Thomas laying groundwork for taking a new look at Roe v. Wade?

What is Justice Clarence Thomas up to? In a recent ruling, he wrote in part,

"A demonstrably incorrect judicial decision ... is tantamount to making law, and adhering to it both disregards the supremacy of the Constitution and perpetuates a usurpation of the legislative power."

Some on the Left think he is referring to Roe v. Wade, and they are worried. Read more here.