Red (Automation science pack) will stay the same.
Green (Logistic science pack) might get a 1x pipe added to it, but this is not yet confirmed in FFF#275
2x Grey (Military science pack) will be 1x Piercing rounds magazine, 1x Grenade, 2x Wall.
2x Blue (Chemical science pack) will be 1x Solid fuel, 3x Advanced circuit and 2x Engine unit. "Now a single craft of Science pack 3 returns 2x as well. The ingredient count and crafting time has been increased to compensate."
3x Purple (Production science pack) will be 30x Rail, 1x Electric furnace, 1x Productivity module. "Production science pack now returns 3x packs in a single craft."
3x Yellow (Utility science pack): 2x Processing unit, 1x Flying robot frame, 3x Low density structure. "Utility science pack now returns 3x packs per craft, making it clear that it is the same tier as Production science pack. Processing units stay, but their number is reduced from 3 to 2, it was just too many."
1000x White (Space science pack), cost to launch one rocket: 1x Satellite, 1000x Rocket control unit, 1000x Low density structure, 1000x Rocket fuel.
Source: https://www.factorio.com/blog/post/fff-275
Pictures from FFF#275:
Red (Automation science pack) will stay the same.
Green (Logistic science pack) might get a 1x pipe added to it, but this is not yet confirmed in FFF#275
2x Grey (Military science pack) will be 1x Piercing rounds magazine, 1x Grenade, 2x Wall.
2x Blue (Chemical science pack) will be 1x Solid fuel, 3x Advanced circuit and 2x Engine unit. "Now a single craft of Science pack 3 returns 2x as well. The ingredient count and crafting time has been increased to compensate."
3x Purple (Production science pack) will be 30x Rail, 1x Electric furnace, 1x Productivity module. "Production science pack now returns 3x packs in a single craft."
3x Yellow (Utility science pack): 2x Processing unit, 1x Flying robot frame, 3x Low density structure. "Utility science pack now returns 3x packs per craft, making it clear that it is the same tier as Production science pack. Processing units stay, but their number is reduced from 3 to 2, it was just too many."
1000x White (Space science pack), cost to launch one rocket: 1x Satellite, 1000x Rocket control unit, 1000x Low density structure, 1000x Rocket fuel.
Source: https://www.factorio.com/blog/post/fff-275
Pictures from FFF#275: