Tablewar along with Frontline Gaming has a Kickstarter underway for their new MegaMat.
From the campaign:
MegaMat™; a series of themed, full color 4’x6’ (and 4×4’ with stretch goals) tabletop gaming mats that don’t crease and resist stains, ready to play out of the box. The first two MegaMat™ design prototypes–Grassy Plains and Blast Zone–are done and in our hands! We have plans to unlock Urban, Snow, and Desert themed MegaMat™ designs in 4×6′ and 4×4′ sizes with stretch goals!