Some of the new features are nice but I agree, for now, there isn't a massive difference other than being tablet/phone friendly for development (if I had to commute for an hour each day though this would be a huge selling point for me - but I don't so it isn't).
1 year from now I am certain c3 will be significantly better than c2 in terms of usability (and I love c2, that is an understatment). Based on that I think it's probably better to get used to c3 from the get go if one were new to the scene (instead of buying c2 and then switching over in a year anyway).
I am hoping they add an option to buy c3 without a subscription at something like 5 times the yearly cost (or whatever seems reasonable to them). I would happily pay that much to not be 'on the clock' so to speak. Fingers crossed,