The URL could stay the same, it would just need to be directed at the blockchain. And if they have pics or videos, that would have to still be stored on a cloud service or their own servers. Pics and videos are not on the STEEM blockchain....anything submitted through Steemit is on AWS.

The challenge at the moment is the sign up process. I am hoping the Steemit development team is close to solving that issue. Looking at the stats the last few days, only 500-700 signups per day.

I know there is more interest than that.