The thinnest depth of TVs that have been available for around the same time as this television is 2.9mm and the thickest is 100mm. The UE55H7090 has a quite thin depth (only 33.2 millimeters) compared to most of the other similar spec televisions that were released more than two years ago.
Alternative 33.2mm thick TVs currently available which you might want to look at include the Samsung UE55H7000 (£1,299.99) which has better reviews.
If you don't mind having a thicker depth then you might want to look at the Samsung HG55EC890 (£1,468.73) (33.2mm).
What does "depth" mean?