plus the Shield does not have a dedicated iptv Middleware program onboard (Stalker or other Middleware).
I usually will not take part in box recommendations, but if or when I do, it will always be a box with some form of Middleware for IPTV (Stalker or other).
That nvidea shield is probably one of the best Androids on the market, but it lacks the ability to run an iptv service, unless there are extra programs installed by the user.
In my view, the trick is to get best possible Android with good memory (flash and RAM memory) and some other factors, and that also utilizes some form of Middleware for iptv.
All them boxes I had posted above, do that.
Well except that mag256w1... it does not run an Android Operating System but does have the Stalker Middleware (or the new middleware informir is now using), low memory thou...but worth the mention just cause
... but the Mag 410 does have both Android OS and Middleware as well, and is why I added it (2 GB RAM and 8 GB Flash on board / OS Android v6.0.1 / Pre-integrated with Ministra Middleware from Infomir).