Based on my spreadsheets, a single person in CA will pay less taxes in 2018 vs. 2017, until the $350K+ range. If you factor in property - everyone's is a little different, but you can multiply your federal with your estimated additional property tax deduction, to see where the breakeven point is. If you are paying 1.1% property tax on a $500K home, then that's about $5.5K of non-deductible tax, or 35% * $5.5K=$1,925 of additional taxes, moving the breakeven point to the $190K range (I would also consider the Pease limitation/itemized phaseout in 2017 to this as well, but let's keep it simple for now).
Basically, people in the $0-200K range are going to see substantial tax cuts. (In 2017, people would enter AMT "by default" without even property at the $200K-ish range just by virtue of state tax deduction). So the percentage of Americans who perceive they will receive the tax cuts is probably lower than the percentage of Americans who actually will receive a tax cut. The hardest hit are probably the absolute top bracket CA/NY taxpayers with large property tax bills and very high 6 figure income (think $500-800K)+, because at the very high 6 figures in 2017, you start getting out of AMT again, so you can take full advantage of the state tax deduction.
Here's what I have. Math done a year ago. Sam, or anyone, if you're interested in the source I'm happy to share the sheet.
(https://i.imgur.com/ELsG08U.png)
couchfi, you may want to verify the numbers again with AMT in 2017 assuming you're in CA. And congrats on the IPO!
That SmartAsset calculator is a good start, but doesn't take into account AMT in 2017 - which actually significantly changes the calculus. For whatever reason, most online tax calculators just say "AMT is too complicated!" and throw up their hands, when really you just need to add a few more formulas to your Excel sheet to do AMT. That's also why I think the loss of the SALT deduction is *way* overblown - you need to get really high up in the income brackets until 2017 tax rules are better than 2018. But because most people are not going to crunch the numbers, and for whatever reason no accurate calculator has been output, most don't realize.