Well There are 2 cases to be considered:
SegWit - They are proposing to increase the Bitcoin block from 1 MB to 2MB.
I don't think, this is the solution because in future they may ask for even more block size.BTC unlimited - They are proposing the block size to unlimited size.
I don't think it is a permanent solution either. Because, Blockchain will be huge in size then.
This is actually wrong.
Segwit is an upgrade that solves a lot of bugs, an added value of segwit is that it will allow more room for transactions, the block size remains in 1MB.
Bitcoin Unlimited supporters want a block size increase to at least 2 MB.
That's not how it works:
Both have issues. BIP100 or Bitcoin ABC might be better solutions.