Every time I go to Bestbuy -- or any other electronics retailer -- I find myself spending more time chasing salespeople to get my questions answered than actually looking at the products.
Their system seems very inefficient; sales personnel are walking around the store on a seemingly random pattern (or from one desk to another) and ask customers they come across if they have any questions.
1- There are no sales personnel anywhere near what you're looking at
2- There are sales personnel but they are busy with other customers
3- There are sales personnel but they can't help you, so they go fetch someone who can, while you wait a little more
The problem is that customers are impatient and they feel entitled to quick service.
So how about this: install buttons on every shelf. When customers are looking at a product and they have a question, they press the button, and the system sends over the next available and capable salesperson to the customer.
I think it would be fairly easy to implement and install, and it would improve customer experience and efficiency of employees.