I know about HDMI.  Just not sure how I’d use it.  I also know that you do NOT have to buy the gold cables ever.  They all work alike.  It’s just a bonus up sale for the merchant.

I love the garage door remote interface in my car. 

Also the little lever that increases or decreases my cruise control by 5 mph or 1 mph.  Very easy to stay the speed limit while cruising.