Mobile World Congress (MWC) 2013, which took place in Barcelona, Spain, finally wrapped today after four days of learning, networking, product showcases and more. So what are the big takeaways? Let's go over some of the highlights:

1. 70,000+ visitors

This year's MWC saw a record-breaking number of attendees. According to Reuters, "The four-day conference and exhibition attracted executives from the world's largest and most influential mobile operators, software companies, equipment providers, Internet companies and companies from industry sectors such as automotive, finance and healthcare, as well as government delegations from across the globe." It was the trade show's biggest event ever.

2. Products for developing countries

While there was certainly no shortage of expensive products, a new trend was seen at MWC this year. The Telegraph reports that a new Nokia phone "offers a battery that lasts for a month at just £13." That's less than $20! Furthermore, Nokia has promised to introduce smartphones at lower price points, as well.

3. A Firefox operating system

Most people are familiar with Mozilla's Firefox web browser. But at MWC, Mozilla debuted something new: An operating system (OS) that's "based completely around a browser and Web standards," reports PC Mag. While it's being released worldwide soon, the new OS won't make it to the US until 2014.

4. Smart glasses

There's been a lot of hype surrounding Google's "Project Glass" lately. During MWC, however, the spotlight was on a different glasses project. According to the Wall Street Journal, Vuzix Corporation's M100 Smart Glasses feature "a near-eye micro display with an integrated camera and powerful processor running an Android OS." The device connects wirelessly via Bluetooth or WiFi to smartphones and other devices.

What other products or trends from MWC 2013 stood out to you?

When you think about which areas of the world are at the forefront of mobile technology, innovative app development, and the ever-expanding capabilities of cloud computing, places like California's Silicon Valley and New York City probably come to mind.  But the location of this year's Mobile World Congress, host to visionary keynotes, top-of-the-line product and service exhibits, and App Planet, the "center of the mobile apps universe," may surprise you.  

The mobile technology trade show, which began yesterday, February 27, 2012 and runs through Thursday, March 1, 2012, takes place in none other than Barcelona, Spain.  The Mobile World Congress' agenda reveals that the four-day event comprises seven keynote addresses, multiple educational seminars, and several networking opportunities.

But what attendees are undoubtedly most looking forward to are the phones and other mobile devices on display.  And, according to Fox News, the star players at this year's show are the super phones.  "At the Mobile World Congress in Barcelona this week, the annual coming out party for new mobile handsets, the trend is clear," Fox News reported.  "Rather than getting smaller, smartphones are getting bigger -- and more powerful."

The overwhelming presence of large and intelligent phones at this year's conference begs the question:  Are consumers really going to buy the bulky new cell phones?  Fox News reports that it's almost certain.  After all, the latest devices were designed with customer use in mind:

"Super phones are partly an acknowledgement of how people are using smart phones these days. They're making fewer voice calls and making more Facebook posts and text messages. Most people use apps for finding a restaurant, uploading a picture or checking in to a coffee shop rather than calling home."

And the response to the electronics industry trade show promos so far has been a positive one.  Guests at the conference are enjoying the products' faster processors and larger screens.

If you're not a fan of the expensive and brawny smartphones that are getting the most attention at this year's Mobile World Congress, don't worry; there are options for you, too.  Computer World reports that both Nokia and Intel are displaying "cheap smartphones" for those who refuse to pay for (or simply are not interested in) a quad-core processor and a huge screen.