Alexander L. has written a fantastic review of Deadlands Noir, so, instead of assuming you're incapable of reading his review, I'll some additional comments to add to it.
Do you need Deadlands: Reloaded?
No, but you should be familiar with the Deadlands setting. But, since Deadlands: Noir takes place in the Depression, certainly none of the characters will care about some history lesson from a century ago. They're too busy trying to find a dime for their next meal. The Deadlands weirdness works well as the underbelly of the city, so players unfamiliar with Deadlands can easily play player characters who are discovering things they shouldn't know.
Do you need Savage Worlds?
You should. About a third of the book includes Deadlands: Noir rules for Savage Worlds, stats for important NPCs in its New Orleans setting and a bestiary of Deadlands critters you don't want to tussle with.
The Savage Worlds RPG and miniatures skirmish game system support cinematic gaming very well. The Deluxe PDF edition is ten dollars and really can be used for more roleplaying games by itself. The earlier Explorer's Edition can be found hardcopy for ten dollars or less at the OLGS. You can also get the Savage Worlds: Test Drive edition free on DriveThruRPG or the Pinnacle games site. You're welcome.
Of course, with this being Noir, your players will be investigating and roleplaying more than hacking and looting. So, if your players are obstinate, adapting Deadlands: Noir to your system of choice isn't impossible.
Is this game only for Deadlands players?
No. This game could have been equally called Noir: Deadlands. Deadlands gives the game a unique flavor, but can be suited for your playing group's taste. Investigative Call of Cthulhu players will also enjoy this game, as Deadlands: Noir supports adventures where something spooky lies underneath the story.
In fact, most character types have changed, and some eliminated entirely. Blessed, sykers, and martial artists are rare so will be covered in the Deadlands Noir: Companion. Indian shamans exist, but not in the urban landscape of Deadlands Noir. Mad scientists evolved into patent scientists. Hucksters were hunted down, with those remaning becoming Grifters. Voodoo, however, has risin in New Orleands, allowing players to play shamanistic characters. And the Harrowed are still there. Savage Worlds supports designing characters based on skills, not classes, so players always have the option of playing their favorite noir character idea.
What if I don't want to run premade adventures or don't want to set Deadlands: Noir in New Orleands?
Okay, maybe this book won't work out too well for you. There is a two-page mystery generator you can use to create your own adventures. But about a fifth of the book is dedicated to a seven-adventure campaign, with the shorter mini-adventures usable between these adventures. New Orleands (and its corrupt factions) is the only city covered in this book. See the Deadlands: Noir Companinion for additional cities.
As of this writing, the Deadlands: Noir KickStarter is still shipping dead tree versions of its books, so it's not too surprising that the only support are some premade characters and a character sheet. The premade characters are definitely worth looking at. Deadlands: Noir mentions miniatures and printable and purchasable maps of the adventures in the PDF, but I couldn't find mention of them on the website.
One irritation I have with PDFs is that many of them make a PDF of the book, and that's that. IMO, Since PDFs have an unlimited page count, and material that couldn't be included in the dead tree version because of printing costs should be included. Also, PDFs allow printing of individual pages. The artwork includes mug shots of NPCs. So Pinnacle could have included NPC picture profile handouts for the GM to print and cut out for the players to see whom they were dealing with. Also, since Savage Worlds supports miniatures gaming and they have the full-body art of the beasties, I would have liked to see paper miniatures included with the PDF.
Conversely, a 145 page grey-color intensive coffee-table PDF is not something you want to print out. No printer-friendly version is included. Entries for NPCs and beasts have widows and orphans (ie. a one-page entry for a beast will start at the bottom of one page and go to the other side). Artwork that looks purdy in the electronic coffee table book consumes ink and toner when you have to print out the page it's one.
[5 of 5 Stars!]