Anything is possible, but for this current decade the Denver CSA has widened the gap on the Salt Lake CSA.
The 2016 CSA estimate for Salt Lake is 2.514 million, which is 10.4% growth since 2010.
The 2016 Denver CSA estimate is 3.46 million, which is 12.3% growth since 2010.
https://factfinder.census.gov/faces/...xhtml?src=bkmk
Here's all 1 million + CSA ranked by percentage growth - 2010 to 2016:
Percentage Growth – 2010-16
1 Cape Coral-Fort Myers-Naples, FL CSA 15.7
2 Houston-The Woodlands, TX CSA 14.0
3 Orlando-Deltona-Daytona Beach, FL CSA 13.7
4 Raleigh-Durham-Chapel Hill, NC CSA 12.7
5 Denver-Aurora, CO CSA 12.3
6 Dallas-Fort Worth, TX-OK CSA 12.0
7 Nashville-Davidson--Murfreesboro, TN CSA 11.1
8 Charlotte-Concord, NC-SC CSA 10.8
9 Salt Lake City-Provo-Orem, UT CSA 10.7
10 Seattle-Tacoma, WA CSA 9.6
11 Las Vegas-Henderson, NV-AZ CSA 9.5
12 Oklahoma City-Shawnee, OK CSA 9.3
13 Atlanta--Athens-Clarke County--Sandy Springs, GA CSA 9.2
14 Miami-Fort Lauderdale-Port St. Lucie, FL CSA 9.0
15 Jacksonville-St. Marys-Palatka, FL-GA CSA 9.0
16 Portland-Vancouver-Salem, OR-WA CSA 8.2
17 San Jose-San Francisco-Oakland, CA CSA 7.3
18 Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA 6.8
19 Sacramento-Roseville, CA CSA 6.3
20 New Orleans-Metairie-Hammond, LA-MS CSA 6.2
21 Greenville-Spartanburg-Anderson, SC CSA 5.9
22 Columbus-Marion-Zanesville, OH CSA 5.8
23 Minneapolis-St. Paul, MN-WI CSA 5.7
24 Indianapolis-Carmel-Muncie, IN CSA 5.3
25 Fresno-Madera, CA CSA 4.9
26 Grand Rapids-Wyoming-Muskegon, MI CSA 4.7
27 Tulsa-Muskogee-Bartlesville, OK CSA 4.6
28 Los Angeles-Long Beach, CA CSA 4.5
29 Kansas City-Overland Park-Kansas City, MO-KS CSA 4.4
30 El Paso-Las Cruces, TX-NM CSA 4.2
31 Knoxville-Morristown-Sevierville, TN CSA 3.8
32 Greensboro--Winston-Salem--High Point, NC CSA 3.8
33 Boston-Worcester-Providence, MA-RI-NH-CT CSA 3.6
34 Louisville/Jefferson County--Madison, KY-IN CSA 3.5
35 Tucson-Nogales, AZ CSA 3.4
36 Virginia Beach-Norfolk, VA-NC CSA 2.9
37 New York-Newark, NY-NJ-CT-PA CSA 2.7
38 Harrisburg-York-Lebanon, PA CSA 2.7
39 Cincinnati-Wilmington-Maysville, OH-KY-IN CSA 2.3
40 Albuquerque-Santa Fe-Las Vegas, NM CSA 2.3
41 Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA 1.6
42 Birmingham-Hoover-Talladega, AL CSA 1.3
43 Memphis-Forrest City, TN-MS-AR CSA 1.2
44 Milwaukee-Racine-Waukesha, WI CSA 0.9
45 St. Louis-St. Charles-Farmington, MO-IL CSA 0.7
46 Chicago-Naperville, IL-IN-WI CSA 0.4
48 Albany-Schenectady, NY CSA 0.3
49 Detroit-Warren-Ann Arbor, MI CSA 0.0
50 Rochester-Batavia-Seneca Falls, NY CSA -0.2
51 Dayton-Springfield-Sidney, OH CSA -0.5
52 Buffalo-Cheektowaga, NY CSA -0.5
53 Hartford-West Hartford, CT CSA -0.7
54 Cleveland-Akron-Canton, OH CSA -0.9
55 Pittsburgh-New Castle-Weirton, PA-OH-WV CSA -1.0