Here is the message I got when looking at one of my local stores BestBuy pages.
Come join us on August 9th and 10th 2013 for TAX FREE!!! save time and Reserve your products starting Sunday August 4th -August 8th…NO DEPOSIT REQUIRED!!! Thank you and we look forward to seeing you then.
Thursday 8th 11:00pm to 1:00am (begin shopping at 11pm and ring up at 12:01am August 9th)
Friday 9th 9:00am to 9:00pm
Saturday 10th 9:00am to 9:00pm
Not sure if this can be used on pre-orders like the PS4 or Xbox One but if it can and you are a rewards member, you could be getting a lot of points to go towards some more savings.
Check the news section. Looks like it random stores that are doing it but worth checking out