I am going to test out some smart home products to see how smart they are:
TP-Link N300 Wireless Wi-Fi Router
It is most useful in a situation when you need to set up a local network with a Broadband internet connection (i.e. phone tethering). The fact it has 2 LAN ethernet port makes it useful to hook up with other smart home devices requiring wire.
Philips Hue Starter Kit
The changing light scene and music/movie sync makes the most visual impact. Wow! Cool!
Philips Hue Lightstrip Plus
You need the lightstrip for accent lighting: behind bed board, under kitchen counter, under entertainment cabinets, behind TV, etc.
Amazon Echo Dot
What is a smart home without voice command?