The first sentence is confusing - we wouldn't be extending the TournamentSR program's display. The additional display would be for each MatchScorerSR computer. As you described, the second monitor would be facing the mat/audience and display what currently appears on dedicated clock/scoreboard systems.
Yes - that is our plan. You may have noticed that on many computers, the MatchScorerSR window doesn't extend to the right edge of the display. That is reserved for the upcoming enhancement for controlling the scoreboard/clock display. You may also have noticed that during the match, no keyboard actions are used to run MatchScorerSR. The plan is to control the clock using a USB numeric keypad attached to the MatchScorerSR computer.
With that said, MatchScorerSR will no longer be free when that feature is added. We know that a lot of support will be needed by users trying to get a second monitor working with their Mac or Windows computer.