First gameplay:

View on YouTube

Wow that looks incredible, opening doors to the worlds in the distance was fairly class looking idea (if I understood it correctly) looked like a mix of Minecraft, Stargate and possible some bits of WoW thrown in for good measure.

But yeah, that beautiful timeless look to it is really appealing to me, not too realistic, just like WoW in ways.

I was always interested in it but this looks much better than I imagined.

Very cool! Looking forward to adding this to my list of gem indie titles which so far includes Enter the Gungeon and Hyper Light Drifter for this gen.

Nice! I'll do my best to keep this one on my radar.

Didn't know it's an early access game on Steam until now:

http://store.steampowered.com/app/324510/

if this becomes a success then the mmo genre would made a comeback.

is it cross server play PS4/PC/Mac?

It's early access atm on PC, so I dunno.

If it features full mod support on PC then I really don't see crossplay happening.

Also just noticed, on Steam they are asking you for £26.99 for the base early access game,  £39.99 for the collectors edition and £14.99 for DLC. THe game isn't even finished yet either.

Edit: on the modding (from the devs mouth):

1. The Oort Online MMO will not be modable. The MMO is a single carefully balanced set of rules and living worlds.

2. The Oort Online Server will be modable. Take the engine + server and mod them. Then run the modded game alongside the official OO MMO.

From the game's about page:

BOUNDLESS IS CURRENTLY A PRE-ALPHA EARLY ACCESS GAME. WE ENCOURAGE YOU TO WAIT UNTIL 1.0 IF YOU ARE NOT WILLING TO PLAY A GAME WITH AN INCOMPLETE FEATURE SET, BUGS, DOWNTIME AND SERVER WIPES. THIS EARLY VERSION IS FOR PLAYERS WHO WISH TO BE ACTIVELY INVOLVED IN THE DEVELOPMENT OF THE GAME.

Explore a vast universe of connected worlds. Build an empire with friends. Become Boundless.
Build a shop and trade your treasures, create amazing sandbox contraptions, hunt for Titans, sell your services, claim land, see the worlds, open a Portal and expand your reach across the universe. Create your citizen, define your role, make your mark, become Boundless. 
Boundless is currently Pre-Alpha, and we're working towards a full launch on the game in 2017, but we invite you to be involved in the development process now through Early Access.

Whether you are a seasoned hunter, a weathered explorer, a master builder, a shrewd trader or a natural born fighter, there is a place for you in the massive open-world sandbox universe of Boundless. Watch the sunrise on one world before hunting down epic Titans on another. Explore caverns on your own or build a city with your guild. Mine, trade or fight Protectors for resources and search for elusive Oort technology. 

Buying DLC for a game in pre alpha, what have we become :<

I can confirm. Boundless will support cross platform play.