This isn't about shares. It's about options and R
Post# of 22454
Ordinary income is already reportable and taxable at the fair market value of the share when a restricted share vests (or you can make a section 83(b) election when you receive the restricted shares and pay the tax then on a hopefully lower FMV). This value reported as income becomes your cost basis in the stock and anything you make over that is taxed as a capital gain when you sell the share (assuming you satisfy the holding requirements).
This proposed change is seeking to apply a similar taxation scheme to options and RSUs which currently are not reportable as income and taxed until they are exercised.