That is an odd conclusion. Vienna is a nice city, but even for European terms it is not exactly a hotbed of innovation and start ups. Try Berlin, London.
For now I'm living in London. I considered Berlin, but I think the English practice here is invaluable. My English was already quite good when I came here, but it's improved LOADS. Also there's much more going on in general (culturally, socially), and there's more and bigger startups here (e.g. compare HN Who's hiring / startup city rankings).