This wasn't a full weeks worth of sales right? The game was released on a Thursday May 29th. I think the next sales update will show a greater increase in hardware sales than this.
May 30th, so two days. But people always say this and it's just not how it works. The biggest boosts and the most sales happen day 1. Now MK is a series well-known for legs, so the drop hopefully won't be too severe, but HW sales won't be higher next week.