Why are moving away from powerful and flexible systems that allow us to consume and produce? Why is the trend so constantly towards sealed, black-box, consumption exclusive habits? It makes me so sad to see.
* Web apps get more complex, giving you the ability to work & create on the web, Google docs let you literally stop mid-sentence, switch the device and keep writing your essay on the go
* Tumblr, wikipedia, twitter, - all relatively recent additions to the web and definitely not "consumption exclusive"
I'm not sure where your "consumption exclusive" comes from. I'd call it just "inclusive". The web tries to be for everyone, and that includes people who couldn't care less about a 20 character hex id when they want to write up their great concept for developing rural areas in Rumania. Sure, you will always have more consumers than producers on the grand scale of things. But I'm failing to see any reason to see recent trends as anything close to what you describe.