I disagree. The fact they can now mass produce insulin producing islets and have a mechanism of ensuring the immune system doesn't attack them means it's very likely to be a long term cure.

The mice they have been testing have maintained their glucose at human levels for months (they generally run 60-80 points higher than humans). They've binged and fasted them, made them sick and everything and their levels have maintained.

This is definitely promising, don't be such a wet blanket before researching a little bit!