Snibble- some great posts on this thread, thank you.
I know this will be disjointed, but I have been too busy doing all the slaving, as Reality said, to post until now 
I don't think the Spice Girls were empowered. I think at certain times in history, when women are becoming too aware of their situation and start to be bolshy about it, there are pressure-release valves, and "Girl power" was one of those.
Sure, they sang and danced and did back flips, and portrayed the idea that they were in charge... but they were a manufactured band, a product, and still conforming to male ideas of women. So there was a girl next door, a sporty one, a haughty one, a little bit over the hill one (because yes, Geri was always pilloried for being older than the others, at what, 28??) and a black one. You know- one for every man really 
And they sang about enjoying sex, and freedoms. But what did it lead to? The idea in our society that all women are gagging for it, that we lurve it, and that's our focus. So girls were 'empowered' and given liberties... purely to satisfy men. The was society has been sexualised and pornification after "Girl Power" has been highly retrograde, and damaging for all, but particularly for girls and women.
Other pressure-release valves were Votes for women. Oh yes, women fought hard, and demanded representation. But what actually happened? They enfranchised every male as well, diluting the power of the vote, in effect. (And look at the way this weakening of democracy has continued- quangos, cabinet government, hundreds of life peers created
)
The powerful retain their power, whilst giving the populace a semblance of that power, but really giving them nothing.
I think "MeToo/Times up" will be exactly the same, and I dread to think what it will be that will emerge from it, and how it will further curtail women's freedoms.