That is nothing new. Unless your healthcare premiums are deducted from your gross pay (in which they aren’t taxed anyway), you can already deduct the cost of your health insurance premiums. See the last bulleted item here: https://www.irs.gov/taxtopics/tc502.html
As it stands now, you can only deduct the medical expenses that are in excess of 7.5% of AGI. So if your AGI is $100k and you had medical expenses of $7501, you would only be able to apply $1 towards your deductions. And then all of your other deductions would have to add up to an amount greater than the standard deduction before you would see a reduction in taxes owed.
A great deal of out of pocket medical costs have to be borne before it affects the taxes we owe. What is really needed is to lower that 7.5% threshold.
Unfortunately, that's not the case.
If you re-read that last bullet the deduction only applies to long term care insurance premiums.
Regular medical insurance premiums aren't deductible for individuals.