It’s like they (UA and CO) were reading my post this morning. You can now move your CO frequent flier miles to United or the other way around AND it appears you can combine your elite qualifying miles into one program.
Here are the links:
HaHa. They both take you to the same page.
Good news if you were short in one program. You do not need to make the transfers now if your travel plans are undecided. They will happen automatically later this year.