There's still an outside chance that Dallas could miss the playoffs.
If Dallas would lose out, Utah wins at least two of their remaining three games, and Houston wins out, then there could be a three-way tie where Dallas would lose the tiebreaker.
Even if Utah won out, Dallas lost out, and Houston won out, then Dallas would lose the tiebreaker to Houston.
The schedule is actually favorable toward Dallas missing the playoffs, too, but it will all depend upon who rests their guys down the stretch:
Dallas - @ LAC, @ Utah, vs SAS
Utah - @ Denver, vs Dallas, @ LAL
Houston - vs LAL, @ Minnesota, vs Sacramento