[London Lite]

Am I right in thinking the Smart Stick was just a glorified Roku streaming stick though?

All of the Now TV devices were stripped down Roku's that could only allow access to Roku apps that Sky allowed to be used, this is why it took a long time for Netflix to be allowed on them. So the additional apps were largely the catch-up services from the BBC, ITV, C4 and C5, YouTube, Sky Store plus some obscure apps. Eventually Sky had agreements with UKTV, Netflix and Disney which were added to the platform.

In the early days, you could also sideload other Roku apps, Emby and Plex were popular sideloaded apps, but Sky took away that functionality as well.