TL;DR --> Go to Meguiar's forum, read up on processes, and stick with high quality products (Mother's, 3M, Meguiar's) and stay away from what is arguably crap (Turtle Wax, ArmorAll).
Long winded opinion:
It's somewhat a trick of the picture, but the result is definitely achievable in real life. It's just if you want/have the time to complete it. Mirror/showroom detailing will get you A LOT of different methods, and A LOT of different opinions. Anything from rinsing with cold water between wax coats (depending on wax type), to needing 7 different products just for paint, to hand vs. power buffing.
Personally, I use Meguiar's products as I have had great results over the years. My standard wash can be as simple as Gold Class Car Shampoo/Conditioner, a clean microfiber towel dry/water blade, and buffing up the plastics. More detailed would be something like I did in this thread when I first got it:
http://www.mazdas247.com/forum/show...cture-Thread&p=6341799&viewfull=1#post6341799
(Comparison of my pictures vs. the showroom pictures,: the clouds were out so the sun intensity was no where near the level of the lights in the showroom. In addition, once you get a "wet look", it's really reflecting everything back to you. Such as the grass around the car, the dull fall trees, etc., which will affect intensity)
I am by no means an expert, but there are litterally a TON of products out there. One I'm interested in adding between the clay bar and ultimate wax step is Meguiar's Mirror Glaze, as I've heard good things about it giving a DEEP gloss look.
I would reccomend fooling around on Meg's forums:
http://www.meguiarsonline.com/forums/forum.php
There are a lot of articles and a lot of people with ideas for the exact look you're going for.