So this is taking a current tax and adding it to the constitution. This means we essentially break even as the tax is already being paid. The pro-argument appears to be that it will generate jobs (3600+ yearly) and 8.2 billion in revenue over the next decade. The against is that we already have the 2nd highest sales tax nationally (I'd like to see a citation for that as I don't know if that's true) and that this enshrines the tax as a permanent fixture in our constitution.
The current tax as it stands exists through 2023 anyway as I understand it. I'd be more comfortable voting to extend or decline it on every 2 or 4 years.
Ballotpedia: The Encyclopedia of American Politics
ballotpedia.org