In most ways, Blu-ray is quite similar to DVD. The players look the same, the discs look the same, and even the disc menus are smilar. So why pay more?
Blu-ray brings three major improvements over DVD: better image quality, better sound quality, and more special features. All there are made possible by the larger storage capacity of Blu-ray, which is capable of storing 50GB of information on a single Blu-ray Disc, compared with DVDs, which can hold about 8GB.
But, of course, there are some things to consider if you are completely married to the DVD format(and you may be without even realizing it-see below.)
Advantages:
First and foremost: DVD discs Do play on Blu-ray players, but not vice versa.
You need not worry about your DVD collection on the new player but your Blu-ray discs will not play on DVD devices.
Image quality on Blu-ray: superior, the contrast and richness of colors it’s something I have never seen, not even at the movies! Blu-ray is the highest quality video format available today. If you have an HD set (which I strongly recommend you have if you are going to make this investment) you clearly see the difference between Discovery and DiscoverHD channels, right? This is even better. Technically, Blu-ray’s maximum resolution is 1,920×1,080 (1080p), while DVD is limited to 720×480 (480p). Blu-ray also uses better video compression. I think of it in terms of cameras. You remember that 3 pixels camera and how GREAT the picture seemed? Think of the 12 megapixel cameras now in the market and the improvement of the image. Same here.
Sound/Audio: If you have a high-end audio system, it will make a difference. New high-resolution soundtrack formats, replicate the studio master. Blu-ray has more capacity that DVD technology and can hold higher resolution sound formats. But, again, you really need a high-end sound system to enjoy this benefit.
Pop up menu: in the newer players, it can be accessed while movie is playing and includes special features, like picture-in-picture commentary. You must be connected to the Internet for many of these extras to work.
Food for Thought:
Cost: Blu-ray players have come down in price but the cost is really in the discs. At $25+ a pop, do your research and find the lowest prices.
Broadband connection: you must be connected to high speed Internet at all times, and you can’t do it wirelessly as a gaming unit would (but you can connect the unit to a router via a cable. ) .
Load times: Blu-ray movies take longer to load, sometimes as long as 2-3 minutes. At first, I thought there was something wrong with my player. Keep in mind also that you must be connected to the Internet to receive firmware updates from Blu-ray not only for your player but also for the movies.
Movie availability in Blu-ray format: While almost all new films have a Blu-ray companion release, most movies are still only available on DVD.
Portability: Blue-ray technology is usually not available when you’re away from home, so you will not be able to watch your Blu-ray flicks unless your destination has Blu-ray players (and that includes your laptop and other travel video gadgets.) If you spend most of your time away from home, then buying Blu-ray movies may not be worthwhile.
Having considered all the problems, you may have your own idea about Blu-ray or DVD. To better enjoy blu-ray movies, blu-ray player really seems to be a must in life.
Source:http://www.itoolsoft.com/blog/which-is-better-blu-ray-or-dvd/