Why do people care about the numbers of women in Computer Science classes? Because, they say, it shows some inherent discrimination against women in the industry. (which totally exists, but mainly as a bigger cultural issue that affects everyone along gender lines) If you ask how that could be (as nobody is actually barring women from signing up for classes) the most popular theory is that gender stereotypes combined with an antagonistic male environment leaves women with little choice but to abandon the field.
So the answer has been to make more opportunity for women to join the industry by making it more attractive to them or reducing gender-related friction. Many employers are pushing to find more women in technology/computer science and give incentives to hire them, and in cases like this, change curriculum for schools to make the subject seem more "beautiful & joyful". And it seems like it might be working - more women are now in classes, and one would assume, may some day soon be evening the gender gap in tech jobs.
But what's the end result to merely bringing more women into the industry? Has the culture shifted? Are salaries evening out? Is sexism dead? The people pushing for more women in technology seem to think that by merely increasing the number of women in the field, all of these things will happen. But realistically, none of these things are accomplished just because there's more women in technology.
Compare it to when President Obama was elected, and certain people claimed "racism is dead" because we finally elected a black President. Is racism really dead? Did the culture shift to become more understanding? Did the overall quality of life for black people increase? Did they get higher salaries, or more economic or political power? My casual observation indicates these things did not happen. The culture was not affected, and so, the same institutional problems caused by problems in the culture persist.
And this is what will happen regarding women in technology. Anyone can change their experiment to fit their expected results, and then when they get those results claim they had success. But that's not a cause for celebration. What would be good is if we actually attack the cause of inequality - our cultural differences and biases - to make it so that women are not an exception to a rule, but an equal part of a common community. Merely adding more women to computer science classes is the equivalent of a misogynist saying "Sure, you can have a computer - in the kitchen." The sexism, gender stereotypes, and cultural conflicts will continue to exist until those are addressed directly.