Hi John,
there are some possibilities, though.
However, these are dependent on whether there is a (HD Ready) scaler built in to the BV and if the software is updated.
If not installed, it will be rather expensive and these scalers are also very rare nowadays.
The PUC is a piece of software, that is loaded into the BV to act as a tranlater between the ir controls of an external non-B&O device and the B&O ir remote controls. Meas that you can control the external device with your Beo4.
in your case i would recommend a simple solution of connecting a small fanless pc (or a spare laptop) to the BV. See the user guide for how to.
From that pc you can get access to every service (Netflix, Spotify etc) you want. You could have e.g. the Plex software running there.
If you 'know how to', you can remote control the connected pc from a tablet.
P.S. For audio/Spotify it will be an easy task to connect an AirPlay device or a Spotify Connect device, a Chromecast Audio dongle....
MM