The easy version of this story is that Cleveland is up 2-0. The more useful version is that James Harden has sped up the Cavaliers' timeline.
Game 2 against Toronto looked like a normal star-driven playoff win: Donovan Mitchell scored 30, Harden added 28, Evan Mobley gave Cleveland another major scoring night, and the Cavaliers won 115-105. But the important detail is that this three-man structure reportedly did not get much regular-season runway together. Usually that shows up in the playoffs as turns, pauses, and awkward possessions. Cleveland did not look like that.
Instead, the trio already looks legible. Mitchell is still the lead problem for a defense. Mobley still gives the team shape around the rim and inside the offense. Harden is the piece that makes the whole thing feel less theoretical. He gives Cleveland another organizing brain, another source of points, and, just as important, another way to keep the game from becoming a one-star burden on Mitchell.
That is what makes this dangerous for Toronto and interesting for the rest of the East. A new star arrangement is supposed to need time. Cleveland is acting like it skipped that part. If this is what the Cavaliers look like before the trio has a long history together, then the series score may be the smaller headline. The larger one is that the experiment already resembles infrastructure.