W5500 with Freesat - Pays your money, takes your choice,
This is seemingly just a W5500 with a Freesat Tuner built in. To me it's a simple choice - buy a TV with a tidy integral Satellite tuner at a hefty premium, or buy the same TV minus the Satellite tuner and buy an external dual tuner PVR for half the price difference. For most people, the second option is better, but for some the first is what they want.
Personally, I prefer the flexibility offered by an external tuner. My £180 Technisat HDFS has recently had the capability of recording to a USB stick added via an automatic upgrade and is getting new features frequently. Sony are unlikely to ever offer such upgrades to firmware. I have had a W5500 for 6 months, with no 'feature' upgrades.. i.e. no new widgets, no support for more video codecs via DLNA etc.
As for Freeview HD - if you live in a valley that can't see the main transmitter, you will only get a small subset of channels on Freeview from a retransmitter mast. I live in just such an area, and we've had the switchover... With limited bandwidth, what's the likelihood of HD services coming OTA?