Hi Satish Kumar Balasubramanian,
Being an ABAPER sometimes i also ask the same question to myself that what will be next. But after seing this vast world i am sure that the related technologies always plays a path for Developers.
As you are asking about HANA , as far as i concern and i know about HANA it will be implemented
in all those industry where there are a lots of transactions going on on a daily basis.
As you know that COLGATE has implemented HANA first time and they have provided their server for its tesing on HANA, when i saw first time Vishal Sikka's video for implementing HANA, that time i realise that HANA will play a great role ahead.
As i don't have more idea on HANA , i will suggest you to do a deep search on HANA, then you must move as new technologies always becomes more fruitful to you.
Regards
Sanjeev kumar