Is SegWit2x a Major Blockchain Upgrade or just another Chain Split?

[nizamcc]

I am too much confused over this and decided to ask you that is SegWit2x going to be seen as an upgrade here to the current ongoing chain?
Or will it be split the way we witnessed at the time of Bitcoin Cash? I have not seen so much about B2X but I think it's still seen as an alt and to run an alt, we need a different chain or the same chain but with a split, no?