The parade of Internet- and TV-connected set-top boxes continues – Apple TV, Netgear’s Entertainer HD, TiVo, Vudu, Xbox 360, the upcoming Netflix/LG box – and now comes one called Myka from a Boston start-up with the same name. Although there are many Internet-connected set-top boxes, none of them do everything that’s needed. You’d arguably need half a dozen in your living room to get the full digital entertainment experience of watching Internet-delivered videos on the TV set. Myka calls its new device “the Magic Box you had always wished for … the one that would finally free your PC of all your favorite movies and shows and put them where you can enjoy them better in all their high-def glory…