On the hardware/equipment side of things, an Amano tank is generally described as being rimless, just 5 pieces of glass. They are popularly considered to be open top, in that there is nothing obstructing the view from above. The lighting is usually suspended from cords and hangs above the open top. Equipment is low profile and mostly made of clear glass so that the inflows and outflows are almost invisible, as opposed to the common green or black plastic pipes most aquariums use.
Everything inside the tank is designed to look "appealingly natural" and everything outside the tank and the tank and stand itself are designed to "disappear".
The idea is a cube of water containing nature suspended magically in your home or office. The equipment is meant to blend in so that your eyes automatically focus on the contents and are not distracted.
No one should ever be able to look at an Amano style tank and say, "Wow, you have an Eheim filter!?" or "Hey, I have a Jebo heater too." or "Cool, it's the Titanic!"
The idea is to have them say, "How does it stay so clean without a filter?" "I feel like I'm scuba diving."
"Insanity: doing [or asking] the same thing over and over again and expecting different results."