The updated actually added the ability for the display to show tire pressure in metric and BAR scales. It depends when your car was manufactured, but I have heard that cars built before around 10/2014 lack the hardware to display individual tire pressure readings from the TPMS. Tesla may be able to retrofit the new sensors to add the capability.
If you have the original TPMS (Chinese supplier, not a 1st tier brand, IIRC), you won't receive individual tire information. If you have the new/current Continental TPMS (from VIN P50900 and beyond), you can now see the pressure in PSI and Bar.