4K - the better Full HD TV!

Since I had pre-ordered the TV, I have already received it the day of publication in Germany of Amazon.
Here are my first impressions after the first week.
Motivation: After 3.5 years of operation was the 42 inch plasma (also Panasonic) a bit too small, something new, larger and at the same time Future-proof was needed. The price differences between FullHD and 4K are so far shrunk that a 4K TV for option. 55 inches seemed to offer the best price-performance ratio.
Why this television? The design appealed to me instantly - even in comparison to the options of Samsung and LG; Also good "inner values" (4K, 1200Hz, HDMI 2.0, etc.)
Packing: no objection - slimmer, although large box without "bells and whistles"
Construction: Easy; with 8 screws, the stand is secure.
Setting: Easy; read via DVB-T, the KabelBW - Finished. Blurayplayer via HDMI.
Sound: Due to the low depth we must not expect miracles here. Ok for television - films but rather in DTS on the 5.1 receiver.
Picture: In the LCD Technolgy has caught up in last year some against plasma. Contrast and black levels are almost equal - with the black level in the best is when you exactly in the middle sitting in front of the screen.
Have the brightness turned down even a little - then it fits. Otherwise, no artifacts, ghosting etc. recognized previously.
4K: Presumed generic 4K material I can only comment on "upscaling" of Bluray material at the moment.
Looks great! Extreme sharp and detailed.
3D: Has no priority for me. I have therefore deliberately decided on a TV without 3D glasses. Why should I pay for something that I do not use? The money is better invested in a good quality image. Therefore no star deduction for non-existent 3D glasses.
Wireless, Internet and other Apps: available; but not my main focus; no better or worse than others in this area.

CONCLUSION:
Even without large 4K material selection of the TV for me, "the better Full HD TV" is currently!
Top image and appealing design.

Update 11/21/2014
Now I have tried 3D yet. It requires an active 3D glasses.
Source: Avatar - 3D reference movie!
Tested Option 1: Panasonic TY-ER3D4ME (approx 60 euros each) - has a reasonable on / off switch and can be recharged via USB Micro. In addition, the TV reports a successful coupling.
Tested Option 2: Samsung SSG-P51002 / XC (! About 40 euros for 2 pieces) - runs on battery (button cell), non-rechargeable. No feedback when coupling.
The 3D image is fantastic with two glasses!
The glasses from Panasonic scores with a rechargeable battery, Samsung with the price. When wearing glasses, I find I Samsung even more convenient.
Both are highly recommended. Thus ultimate a matter of preference.

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Thanks!