I would like to see preloaded bitcoin vouchers available to buy with cash in local shops... So you just buy with cash then redeem some code to get BTC.
Ideally you'd redeem an actual private key, but with price fluctuations unless you expected the shop assistant to perform some conversion while you waited, then having to redeem some code from a centralised service would be more likely. (Something like
Giftcoins, which seems to be dead.)
I'm sure we will see this really soon. You can already buy iTunes cards, Facebook vouchers, MoneyPak, etc. so I'm sure someone will distribute bitcoin vouchers in the exact same manner pretty quickly.