is HANA replacing BW completly

Hi all ,

i think this is the right place that i can ask my questions is HANA replacing BI/BW i don't know exactly but one of my friend working in SAP Labs he said with in two years HANA will occupy the BI/BW he explained me what are bad's in Bi/BW(ex: data duplication e.t.c ) and how sap replaced with HANA also is it true and also some where i find that HADOOP vs HANA ( in db point of view only) . is HADOOP is competitor for SAP HANA these are all going in mind till now i got only satisfied answers but i don't know when i will get exact answer.