I have only watched it on my laptop 17'' display...
There's your problem.
You're not going to notice much of a difference on a small screen. This is similar to the issue with 4K, is that, while it has a much higher resolution than standard 1080P HD, it's not noticeable until you get into the larger TV sizes (IIRC 60+ inches)
For a 60'' screen I would need at first a new bigger appartment.
I have a 32'' screen now, and I find the difference between DVD and BD (rather) minor. I have only a viewing distance of 2.5-3 m available, so I am wondering what big a screen would be reasonable, also considering watching (presently) mostly SD-TV ???