Last week I attended the Mobile World Congress in Barcelona, Spain. It’s the industry’s biggest event, drawing over 72,000 attendees from over 200 different countries. The event was massive in both size and scope: booths, the size of city blocks, from the likes of Samsung and Sony to small software developers for mobile devices. Everything mobile was covered. After learning my way around Barcelona’s metro system and fighting through the crowded train stations, I got several days of exposure to what’s happening, and what’s about to happen in the mobile world. Here are some overarching observations: The world is now mobile. While desktops might still have a place in business, the new day belongs to the untethered, highly portable world of mobile devices: phones, tablets, and phones the size of small tablets or small tablets with a phone built in. Payment through mobile devices has become streamlined. There are several…