For the last couple of years, my T4, pension, RRSP, and some of my pension forms have all been imported automatically into CRA, and then into Turbotax.
So maybe it's an optional thing for some employers?
Of course, would be great to just skip the Turbotax portion.
I think that all employers are now required to input the T4/remuneration information in a way that CRA can machine-process it, which allows them to make it available to third-party systems like TurboTax or SimpleTax.
But yeah, for the large majority of us, having the option to skip TurboTax and just use a pre-filled, government generated tax return would be great.