I have not found anything till yet which I would like to be downloaded in 2 minutes. Even if I was on 20 Mbps it would not make any difference to how I use Internet. I am not using 16Mbps because I cannot afford it, its that I do not need it.
I think you're underestimating the new content that a really fast internet connection brings you. Like I said, you haven't found anything that you would like downloaded in 2 minutes because you don't have the ability right now to download anything substantial in that timeframe currently. As an example, the other day I had a few friends over and someone came up with the bright idea of watching Space Jam. This is not a movie I had and it was unfortunately not on the Netflix online watching list. If I was on a <1 mbps connection, that would've been the end of that. Instead I managed to find a download for the movie (and we'll assume it was a legal website with DRM) and you know how long it took me to get it? 8 minutes. I didn't have to wait for 2 hours while the movie buffered/sputtered on some low quality website--I had a full DVD-version ready to go in less than 10 minutes.
This is the kind of content delivery that a high-speed internet connection can give you. Instant delivery of high quality content. Meaning that you don't have to plan in advance if you need to use some massive file.
Edit: I will confess that I was always fascinated with high speed and when heard about Airtel schemes jumped onto one of it. Saw no ROI in it though
I'd argue that your RoI actually increases with a faster internet connection. First of all, everything happens a lot faster so there is less waiting around. Secondly, you don't have to plan everything in advance meaning that you can actually do work exactly when you want to, rather than when it is possible for you to. Consider a scenario where you work on a project all day, do the delivery and come back home. You get a call in the middle of the night saying that there was a mistake in the submission and you have to change it immediately, before it goes out to the client. If you live far away from work, your only option is to work from home. Assuming your corporate network is properly protected by a VPN, I can guarantee you that you will be a lot more efficient with a high-speed connection compared to a low-speed one.
In the end, it comes down to personal preferences, though. However, once you get used to a higher speed, it's impossible to step back. And generally speaking, a person is a lot more efficient with a faster internet connection. You don't have to spend time waiting for web apps to load, software to download, etc. In addition, it opens up a brand new market of internet-connected software... one whose limits you wouldn't be aware of if you hadn't experienced it.