There's one item you missed. Allow me to fill in the gap, since I was just on the phone with the Plat desk earlier this week (and checked on my own progress towards Emeritus):

Silver Emeritus:

12 years in the MR program
Must have earned a total of 1.5 million MR points (not all in your account at once)
Must have stayed 600 paid Marriott nights (in any Marriott brand)
Must have earned Silver Elite 'the hard way' at least once


Gold Emeritus:

12 years in the MR program
Must have earned a total of 2 million MR points
800 paid nights
Must have earned Gold Elite at least once


Platinum Emeritus:

12 years in the MR program
Must have earned 3 million MR points
1000 paid nights
Must have earned Platinum Elite at least once


Good luck!