I'm watching the documentary now and I can see the "new sexism" quite clearly;
Firslt, the popularity of "lads mags" which have become mainstream and freely available for all to see on the shelves in shops, including children passing by. This isn't something that was freely available in the past.
Add to that the freedom the internet has given people to say anything they want, no matter how offensive, to other people with virtually no comeback on themselves has led it becoming normal to expect vile sexist language from strangers. For example, what happened to Mary Beard.
Songs such as Blurred Lines also give the message that the subject explored in the lyrics is ok and normal. It's not. Most adults know that, but this song is played on the radio and on TV for people of all ages to hear (they even played it during a pantomine I saw with my 3 year old at Christmas!). That's not an attitude I want my children growing up with or even exposed to, to be honest.
And finally, the portrayal of women in video games. GTA being the worst example. This isn't something that people, again including children, were exposed to in the past. Now it's considered appropriate enough for a mainstream video game.
Anyway, back on topic, I wonder why Mika deleted the tweet?