I was doing a little grocery shopping today and was trying to remember my mental list.  Inevitably I will forget something or remember it when I am on the other side of the store.  I started wondering why someone hasn't invented, or at least marketed, the RFID-enabled shopping cart.  I know there are RFID devices that know where a cart is in the store so it can play related ads on a little screen.  What I am talking about is a cart that uses my shopping history to help guide and remind me.  Basically this:

Scan your Preferred Customer Card thingie on the cart-this will allow the cart to know your shopping history since every time you use the card to save $2 it tracks your preferences.

Several things could happen next.  The cart could beep every time you pass an item that you purchase frequently.  The cart could alert you to similar items that are on sale.  Or even better yet, it could use a Amazon/Pandora like algorithm to suggest items you may like based on other shoppers that bought similar things.    One step further would be to create an app that would register everything that goes into your cart and then store the nutritional value in a database that you can access from your PC or iPhone.  You could also store a grocery list and then access it from your PDA while in the store.

I could go on and on about the seemingly lack of use of RFID on the consumer side.  I know slotting fees and the like drive the grocery business and the milk is always in the back of the store, but someone, I am talking to you small regional grocery store, should step up and create a truly unique reason to come into one of their stores. 

Your thoughts?