It will offer better overall scalability to a certain extent, but it won't solve anything in that regard. Don't forget that lightning network is an off-chain scaling solution that is somewhat of the only actual way of moving forward.

Good thing is that you aren't forced to use lightning network if you for whatever reason don't want to. I personally prefer to settle all my transactions on-chain, and I'm sure that I am not the only one thinking like that.

In terms of micro transactions, lightning network will tremendously boost Bitcoin's adoption and usability, and let the majority of the people like cheap and ultra fast transactions.

It will drain the altcoin market to such extent, that people won't even bother looking at altcoins anymore aside from speculation purposes. Definitely something to look forward to, hopefully this year.