2GB may last you now, but I guarantee it won't get you very far in the future. Eventually all media is going to be digital and that's going to take data. There's going to be things you can do with your mobile device that we can't even imagine right now. The wireless company's were smart -- they didn't let their customers get used to having unlimited data the way the home broadband companies did. They implemented tiered data plans as soon as they could because once customers get used to something, and you take it away, there's an uproar and an eventual PR nightmare. See Netflix. Wireless companies weren't going to let everyone get comfortable with not having to watch how much they use their brand new shiny toy. They are a business and they are in the business of making money. There's tons more money in charging their customers to only use their devices "this" much than there is in letting them do whatever they want with it and not have to worry about how they use their mobile device. You think apps and downloads are always going to stay the same size as they are now? Not a chance. You're already seeing apps that are increasing exponentially in size. Not to mention things like iCloud and other features. Those take data. In 5 years, 2GB is going to be used up like THAT, even if you try and always use your mobile device only on WiFi (which defeats the purpose of a mobile device). Your buddy is going to send you an HD video of something he saw while you're at the grocery store and that's going to take up data even if you don't want it to.
Imagine if in the early days of home broadband, they did what the wireless companies are doing now in the infant stages of the technology and they introduced a tiered plan where you could save, say $10 a month by agreeing to a 50GB a month data package. You look at your usage for previous months and say, "Hey, I don't use that much. I'll give up unlimited to save $10 a month (just like people did with giving up unlimited wireless data recently) and it was probably worth it at first. But then technology changed. Now there's streaming media 24/7, Netflix, Hulu, online gaming, WiFi where many devices are using the same connection, you have PS3 and XBOX demos that take more than 1GB to download, not to mention full games are now being downloaded. All of a sudden 50GB isn't getting you very far and you're constantly having to watch what you do on the internet and forced to either pay a higher price for a higher tiered package, which funnily enough, costs you more than what the unlimited data package you gave up to save money would have cost you. Or worse, you just don't use the internet until your next billing cycle.
2GB of data may last you now on your smartphone and tablet and other mobile device, but in the future when you're able to stream blu-ray quality video and audio, download every single thing imaginable to your mobile device and many other technological advancements that we can't even imagine yet, 2GB isn't going to get you very far and you're basically going to barely be able to use your device unless you're on WiFi. You're out and about and see that your favorite team is about to win a big game, but you can't watch it on an app you pay a monthly fee to watch all their games on because you're not on WiFi and you're really close to going over your data limit and still have 11 days until your next billing cycle. You'll just have to follow a Play by Play. Your little brother just welcomed his first child into the world and he wants to send you a video of the new baby but you have to tell him to not send it because you're not on WiFi and 2090P HD video will put you over your data limit. Or, you can just pay an even larger fee to upgrade to a higher tiered plan. A higher fee than the $5 a month you saved when you got rid of your unlimited data plan. Maybe in a few years the wireless companies will be nice and offer a higher tiered plan for the same price as the paltry 2GB since technology is changing, but I do not see that happening. Prices will be higher. Way higher than what it cost to have unlimited data initially.
For those of you who still have unlimited data, hold onto it for as long as you can because before you know it, data is going to be at a premium, and there's nothing worse than always having to monitor how much you use your favorite toy.