[mrgreenfur]

I think most of the newfangled POS vendors will help migrate data across. Maybe not historical sales data, but certainly inventory. I also think it's not long before everyone can search local inventories nearby. Unless one of them dominates from the beginning, I can see many POS + web front ends competing for a long time.

[callmeed]

My counter to your first argument is this: if someone's proprietary digital wallet service takes off (like Square's) or someone with a huge base of users with payment data (read: Apple or Amazon) gets in the space, all other POS vendors will get hammered by churn.