Yep 
, thank goodness netinstall has some mechanisms to identify the hardware/architecture and only shows update files (.npk) that are suitable for the connected device.
Probably an added warning like “Netinstall cannot find any suitable update file, check the architecture of this device and verify that a suitable update file is available” would help the less expert/attentive users.
BUT (for next time) DO NOT trust netinstall or any other software and double and triple check to be using the “right” file, when similar mechanisms fail and a “wrong” file is pushed on the device, there could be catastrophic effects 
:
http://forum.mikrotik.com/t/rb5009-cannot-enter-the-system-after-restart/183645/1
(this is a peculiar case, still …)