Most of the things I and probably a massive portion of their customer base/target market would buy from PB Tech are ideal candidates for click & collect or deliver; and PB Tech's stores were absolutely awful to shop in anyway, so this doesn't impact me. I can see less retail sales from the mums and dads and grandparents of the world, but lets be honest - they were probably going to Noel Leeming/Harvey Norman/JB Hifi anyway.
PB Tech will obviously miss out on some sales through this no doubt temporary change, but probably less than you might think. As an ecommerce person the one thing that would worry me is that in the business I work for, our click & collect customers tend to buy an average of $20 of extra stuff (ie things they didn't order online and just saw when they went in) when they collect their online order, so obviously if PB are anything like us that's a pretty significant chunk of change to go missing.