I did wonder about our local coffee shop. My idea was that people could phone ahead for a coffee (in takeaway cups) and then it could be waiting outside with the wireless machine they use to take payments ready to go. You tap the machine (or rather wave your card over it) wait for it to beep and then take your coffee and head off.
I know coffee is hardly the most important thing right now, but we should be thinking about how we can keep these kind of small businesses going for the next few weeks\months.