Starting in 2018, the personal exemption will go away and will be replaced by a larger standard deduction. While this amount will still be larger than the old Standard Deduction + Personal Exemption, you are correct that it will be somewhat muted if you are comparing the old vs. new standard deduction.

Roth Conversions: a smart tax move, or an expensive mistake?

A clear, no-pressure guide to deciding whether converting pre-tax retirement savings to a Roth may fit your situation.