The 24-year-old Oklahoma Sooners player was selected by the Steelers in the fourth round of the 2013 draft at the weekend.
The 38-year-old free agent, who has been a backup to Roethlisberger since 2004, told the Pittsburgh Post Gazette: "Ultimately, I think this isn't about replacing me. Big picture, maybe they're thinking, can we develop Landry Jones to be the starter?
"Maybe two years from now, he could be our guy for the next 10 years. We don't know. But with the contracts for quarterbacks these days, he'd certainly be a heck of a lot cheaper than Ben at age 34 or 35 or 36."
Roethlisberger has led the Steelers to two Super Bowl wins during his nine seasons with the side.