IDC has made a study available about S/4HANA and POWER value prop,
also a german flyer is available… (please request, if wanted, german flyer via pn from jochen.ziegler@de.ibm.com)

http://www.itbusinessbook.com/admin/downloadpdf.php?file=82796-idc-whitepaper-who-can-benefit-from-sap-hana-database-and-s4-hana-on-power.pdf