Oh god I spent too long putting this list together. I was doing it originally just to compare timeframes of construction for Uni vs Disney, but when you look at everything side by side its amazing what Uni has done compared to WDW since 2007. Uni tore down two buildings, built a new one, and opened an entirely new ride (Transformers) in the same amount of time it took TDO to slap some new paint on a Starspeeder and refurb Star Tours. I'm not even going to touch the staggered opening of FLE or the two separate plans for Downtown Disney or the 2 1/2 years it's been since Avatar was announced (which is less time than it took Uni to build and open WWOHP!)
UNIVERSAL
Lands:
WWOHP (1 new ride, 2 rethemed rides, plus new themed attractions and shops, replacing a large part of an existing "Island" plus new expansion)
Announced May 2007
Construction started Jan 2008
Open June 2010
WWOHP 2.0 (2 new rides (if you count Hogwarts Express), unknown number of attractions, at least 2 eateries, several shops, replacing Jaws and Amityville plus new expansion)
First announced December, 2011
Construction satrted right after Jaws closed January 2012
Opening 2014
Rides:
Simpsons (extensive BTTF refurb)-
Announced 2007
Construction started 2007
Opened May 15th 2008
Surrounding area rethemed 2013 with food and a new ride
Rip Ride Rockit -
Announced March 19 2008
Construction started May 2008
Open August 2009
Transformers (completely replacing two attractions/buildings)-
Announced November 1, 2012
Construction started immediately (if not before the official announcement)
Open June 2013
Attractions:
Some Citywalk updates - a Mini Golf course, some other that I'm not sure about. I don't follow Citywalk news that much.
WDW
Lands:
New Fantasyland
Announced September 2009 - originally consisted of Pixie Hollow play area/Meet and Greet, Be our Guest Restaurant, Little Mermaid Ride, Belle Meet and Greet/Show, Cinderella Meet and Greet, Sleeping Beauty Meet and Greet/Show, Barnstormer refurb and move/addition of a new Dumbo Spinner
Construction started early 2010
Plans revised January 2011 - Completely removed Pixie Hollow, Cinderella Meet and Greet, Sleeping Beauty Meet and Greet/Show, rethemed old Toontown into Storybook Circus, added 7 Dwarfs Mine Ride, added a few new minor attractions and food areas
Storybook Circus, phase 1 - Barnstormer, One Dumbo opened March 2012
Storybook Circus, phase 2 - Second Dumbo, Casey Jr splash zone - July 2012
Storybook Circus, phase 3 - Pete's Silly Sideshow and Big Top Souvenirs - October 2012
New Fantasyland, phase 1 - Everything except mine ride - December 2012
New Fantasyland, phase 2 - Mine ride - Sometime 2014.
Avatarland
Announced September 2011
No construction, no opening date. Planned opening sometime between 2016 - 2018. Some concept art shown but not much. No official attraction details but plenty of rumors (imagine Soarin on steroids, and a Jungle Cruise type ride through Pandora)
Rides:
Star Tours 2.0 (update to ride projection, anamatronics, story, slight refurb of queue and ride vehicles)
Announced September 2009
Refurb started Oct 2010
Opened May 2011
Attractions:
Several new Meet and Greets opened between 2007 - 2013 - namely Princess Fairytale Hall (refurb of Snow Whites Scary Adventures, took about a year)
Hyperion Wharf (update to Downtown Disney/Pleasure Island which has been closed since 2008 (RIP Adventurer's Club))
Announced November 2010
Demolition started February 2011, stopped shortly after)
Concept revised in March 2013 to...
Disney Springs
Announced March 2013
Constrction started in Summer 2013
Opening 2016