The Magento team are hard at work readying Magento 2 for a Q4 2015 release. So if you’re planning on launching a new store in the coming months should you bide your time and wait till version 2 is out? Or press ahead and develop with the current 1.9.1 release.
Magento 1.x is not going anywhere for a good few years; Magento themselves, extension developers and the wider magento community are going to be supporting it for the next few years. Magento 2 is shaping up to be a very exciting platform; although like with all new things there are going to be some teething issues to contend with when it gets released. I personally think it will be a year or so until the initial teething issues are ironed out; and even then there is going to be a big plugin gap to contend with.
If you’re going to undertake a small to medium sized project – building in 1.9.1 right now should be a no brainer… if you’re looking for a larger Magento store that is going to take over a year to complete then I would seriously weigh up the benefits and drawbacks listed above before pressing ahead.