movie review TRON: ARES Running time: 119 minutes. Rated PG-13 (violence and action). In theaters Friday. “Tron” was groundbreaking back in 1982 for being one of the first movies to heavily rely on computerized special effects. Forty-three years later, “Tron: Ares” is groundbreaking for being the first “Tron” film with a discernible plot. Isn’t the simple story just a rehash of “The Terminator” without time travel? You bet. But, well-worn though it may be, lighter-than-air “Ares” brings a