The article misses the fact that telcos are about to raise prices locally in return. Personally, I welcome this step since plans are cheap as hell in most countries anyway compared to, say, the US.
Not sure about that, it has not happened after the last few price-limitations that were issued in recent years. If mobile internet is 50-100x more expensive beyond national borders I will simply not use it, it's a lose-lose deal (that is hard for the market to escape from, due to the large fragmentation).
And I'm fine with that. Overall, it means previously underutilised capacity will finally be used. 99% of people were unable to use all mobile broadband when abroad, despite it being cheap and abundant. Now they can.