Well that is one use for it but used in a home for example to make a tv more like a smart TV as they are called now would typically have people wanting to connect mouse, keyboard, and USB flash drives at the very least. For use as a PC in a small business it falls short in many places it could be used because its common to need to connect printers, keyboards, mice, flash drives, scanners and several other devices by USB. Granted some of those can be done other the network, but to make a small cheap printer work as a business print system typically needs a computer connected to it like this, which seems one of the ideas for its design.
Though honestly for use with a smartTV or a touchscreen display for use like you described is really kinda of useless now since numerous android and linux devices exist now that are the size of a smartphone or smaller and made to connect to a TV and do this exact same thing but use much less power, much less space, and since they come with RAM and storage onboard already and typically cost less than this board product above really makes this product a poor choice for those kinds of things. Ones like the Rhasberry Pi B+ even come with 4 USB ports. Granted its performance is lower, but when you are talking about a device meant to only display information, play videos, browse web pages, or other similar small activities it won't matter.
Guess what I am trying to say is above the lack of USB ports creating problems for many places it could be used (like a print server, or home lite HTPC) other products already exist that are cheaper, more efficient, some are more user friendly, and some are quad-core units making them faster also at times. So this product just seems kind of a waste.