What I expect for the machine is a stability and no-lags. I am not a gamer person, I like to watch HD movies though.
As I compare competition machines there is no big hoo hoo. Only resolution differs but the machine will be connected to 24' display. The prices float in the same range.
What are your thoughts on that? I would like to ask you as experienced developers. Will the MBA satisfy me? I know you would recomment MBP but I am not buying it in US and the mentioned MBA costs almost $2k in regional MacStore.
Is it worth to buy this Mac or should I stop thinking about ultrabooks and consider traditional laptop with 4 cores proc and 16GB memory?
I think that system would have more than enough chops to run what you are planning.
For me, the problem would be screen real estate. I'd have a hard time developing on such a small screen. Heck, I'm hanging onto my ancient 17" MacBook Pro from yesteryear in order to keep all that screen real estate.
But as you are going to be routinely hooking it up to a larger external monitor, I think that would be a fine setup.