I found it very interesting that Jeremy Allaire referred to satoshi as a bitcoin unit (2.1 quadrillions) instead of talking about 21 mil BTC.
http://www.youtube.com/watch?v=WMilJzD3pL0I also find it psychologically important for many because they will be currently getting 100mil satoshis when they spend $800-900 instead of getting one unit for $800-900. There is a proposal in reddit to do just that:
http://www.reddit.com/r/Bitcoin/comments/1r3xl1/a_proposal_skip_mbtc_and_switch_directly_to/In the youtube video from DLD Both Barry and Jeremy referred to the 10-100 fold minimal appreciation of bitcoin in order to do large scale transactions and sales.
Mister public cannot spend 10k-100K to get just one unit of account, but it will be OK in satoshis (at US $100K/BTC for each thou you will get million satoshis or thou satoshis for a buck).