I'll be impressed if Sankaku is still even in existence in 10 years. Now not saying it can't be, but, it is the norm that tech completely outmodes almost anything in 5-10 years.
And I have already been able to watch it happen repeatedly several times since 1990.
Webpages used to be so totally the thing.
Online journals were all the rage.
Chat programs have come and gone often.
Blogs have evolved a lot.
Remember when My Space was everything.
Twitter seems old already.
Forums, used to be such a unique experience.
The machines we can use though are constantly changing everything.
Used to be a phone was only good for use as a phone. Now it's part game item, part web browser, part email tool. I have almost no interest in 'improving' my desktop and why would I want to, I can't carry it anywhere. Now all I do is add more storage the way I might add more bookcases to a room. My laptop doesn't have as big a screen, but I can take it with me. And with items like the iPad and all of it's recent competition, soon a laptop will seem clumsy.
The future will be more and more about online activities that can be done more and more from anywhere. I'm guessing the next step is to leap into greater immersion. No more text, all about avatar interaction as if you were actually there.