The new tax law increases the estate tax exemption to $11,200,000 for 2018. Portability option and Credit Shelter trusts can protect up to $22,400,000 for married couples. This eliminates the estate tax as a concern for almost everyone (at least for now). The estate tax exemption will be inflation-adjusted for 8 years, then is scheduled to revert back to 2017 levels (adjusted for inflation) in 2026.
The major issues in estate planning will continue to be incapacity planning, mental health and end-of-life issues, inheritance protection, and determining the best way to leave tax-deferred retirement accounts to heirs and beneficiaries.