I think the larger problem is network bandwidth rather than hard device capacity. Even with high speed Internet connection (> 20 Mbit/sec) it can take a couple of days to download the block chain from scratch.
lol. You only have to download the chain one time - forever.
People sit in their living room all over the planet streaming movies every night and you worry about 2MB every ten minutes? Clearly you failed your math A levels.
Here is some math for you, I really like math.
2 MB per 10 mins = 12 mb/hr
12 mb/hr * 24 hours = 288 mb/day
288 mb/day * 365 days = 105,120 mb
105,120 mb = 105.12 gb/yr
The math above should be pretty simple to understand, just basic multiplication with a small case of division at the end to turn mb into gb.
Storage shouldn't be an issue for most computers (right now anyway) as the standard laptop has 500 gb and a desktop usually has 500 gb - 1 tb of memory.
But, lets say that the 2 mb blocks are added and 2 years go by and I discover BTC. I download the core wallet and start to sync. The blockchain is already around 68 gb so we can do some more math here yay.
105.12 * 2 + 68 = 278.24 gb I would have to download. Now lets take into consideration the price of internet right now.
I pay $94/month for 500 gb of bandwidth. Roughly $0.19 per gb.
Now lets add up that cost with the size of the blockchain a couple years from now. Granted this won't be accurate as internet prices in my area have been increasing as the years go by but it will be close enough.
$0.19 * 278.84 = $52.98
It would cost me over $50 to download the btc wallet which is ridiculous. On top of that it would use 3/5 of my laptop hdd to download it. Now storage becomes a problem. Not only is it expensive to download one program but it will use up almost all of my available storage.
This isn't even taking power usage into factor. It is going to take some electricity to get that massive blockchain synced so will only increase the cost more.
Glancing through some of the other posts on this thread I saw unlimited bandwidth mentioned a few times. Here's some news for those that think unlimited will last forever. It won't. It costs ISP's too much money to let their customers just use what they want.
My ISP is one of the largest in the US (Suddenlink) and we used to have unlimited internet. Well, not anymore we don't and I foresee unlimited bandwidth going away for computer users in the near future.