Potter, I think there is. It's not that folks have a beef with the colours pink or blue, per se, but that these are becoming "codes" for toys, games, etc. that are designated for either boys or girls. I think this can be equally restricting and in fact damaging for both boys and girls.
Things for girls tend to follow the stereotype of looking pretty, being interested in fashion, hair, make up and clothing, going shopping, caring for others and increasingly are also sexualised (e.g. the cartoons that go with Lego Friends are reed thin, long legs, short skirts, tiny waists, make up - not as bad as Bratz or Monster High, but still sexualised,)
Things for boys tend to follow the stereotype of being active, making thinks, doing things, leading - which is mostly good, but shouldn't JUST be for boys. One of the concerns about Lego Friends is that the sets don't allow as much creativity or require as much construction as other sets - reinforcing this idea of what girls "should" do. However, I've noticed that alot of toys, games, etc. targeted at boys tends to be "hypermasculine" if you will. For example, it's about getting dirty, being competitive, being aggressive, sometimes even being violent, often encouraging naughtiness or "getting one over" on your mum. I don't think this is always the right kind of message to be giving to boys!
Okay, none of that is entirely new, but my worry is that it's becoming more and more marked, now colour coded even. It makes it harder for girls who don't want to fit the stereotype of pretty passive princess to engage in alternatives. It's probably even MORE difficult for boys who want to play with dolls and tea sets, act out stories with princesses and fairies, etc. to incorporate this in their play.
A mum friend just a few weeks ago said she was sad that her son (I think he's 7) stopped playing with a girl who'd been his best buddy since they were toddlers. He told her he couldn't play with her anymore because "she's a girl." Yes, girls and boys have always to a certain degree pursued different interests, but now that's being pushed on children almost from birth. I don't think this pressure to go separate ways so young is good for either boys or girls, or for the future to be frank.