That's a big step ... a summary judgment looks at the pleadings & facts most favorable to the non-moving party .. so if one alleges facts in the complaint the show that the cause of action is supported by those facts, then a summary judgment will fail.
I would expect a 2nd summary judgment to be filed after the plaintiff rests in the trial as well. Passing this hurdle (after witnesses are examined and cross examined) is a point where defendants get nervous.
Generally only cases w/o much merit get a summary judgment ruling against them..not that these are a small #.
The ruling does tell us that the case, as alleged by the plaintiff, has merit.