A high-round quarterback selection will not be coming in under the expectation of competing with Romo. The expection will be that a high draft pick will come in and supplant Romo.
Romo is a franchise quarterback. First-round quarterback selections are projected as practically immediate starting, franchise quarterbacks. Current teams (including those headed by guys named Jerry) do not bring in a projected franchise quarterback to replace a entrenched franchise quarterback unless the elder quarterback is about to receive the proverbial boot. Romo's not about to get thrown to the curb unless there is an issue which threatens his ability to play NFL level football in the here and now. The only threat preceived pertains to Romo's back.
Now, before the "Hey! What about Aaron "Discount Double-Check" Rodgers?" gets tossed in, it should be noted that Green Bay was deceived by Brett Favre into believing he was going to retire sooner rather than later. Favre waffling caused Rodgers to remain on the sidelines for as long as he did. Tony Romo does not carry the clout that Favre had in Green Bay. His understandable $100 million supply versus demand contract will not insulate him from being the victim of an invested upgrade at the position. If, for example, Johnny Manziel gets tabbed, Romo's looking at a much shorter season in 2014 than he expects... and not because of an unfortunate injury. Jones will expect him to start in the short-term and he would deal with the ramifications of Romo's humongous contract afterwards. JMO.