I don’t think 3.0 is going to be pushed aside. Trek, Specialized, cannondale and norco to quickly name a few have already picked it as the size for their chubby bikes. Most 2.8 tyres I’ve seen aren’t much bigger than a big 2.5. I’m not saying these will be bad bikes, far from it, but 2.8 isn’t the current popular plus size at all. I guess time will tell .