no futuro, Microsoft vai traga o Windows 10 para o ARM com suporte à emulação x86 para executar qualquer aplicativo de desktop x86 em CPUs ARM.
Finally, to deliver on our customers’ growing needs to create on the go, we announced today that Windows 10 is coming to ARM through our partnership with Qualcomm. For the first time ever, our customers will be able to experience the Windows they know with all the apps, peripherals, and enterprise capabilities they require, on a truly mobile, power efficient, always-connected cellular PC. Hardware partners will be able to build a range of new Qualcomm Snapdragon-powered Windows 10 PCs that run x86 Win32 and universal Windows apps, including Adobe Photoshop, Microsoft Office and popular Windows games.
Mas isso requer CPUs ARM de ponta da Qualcom.
Se o seu amigo usar um CPU x86 baseado em Intel Atom em seu tablet, ele poderá instalar o Windows 10 normal 32Bit.