Confused in buying a new tv dont worry we have a solution for this. what ever the brand may be the consumer must focus on   5 important things. Depending upon the need and usage the consumer must decide....

 Display type: - OLED vs LED vs LCD vs Plasma
This is one of the biggest dilemma for all buyers, whether they should stick to the ageing Plasma TVs, go for the currently popular LED and LCD televisions or invest in OLED TVs, the technology of the future.

For starters, Plasma TVs will save you a lot of money but don't think about the initial cost only, since this type of television draws much more power than any of its competitors. Moreover, since it is an outgoing display technology, manufacturers will stop customer support in a few years, leaving you stranded if you need a component replaced. Nevertheless, Plasma TVs offer superior contrast and dark blacks, along with excellent viewing angles.

LCD TVs use CCLFs (Cold Cathode Fluorescent Lamps) and are the next in line in terms of power consumption; however, these score poorly when it comes to viewing angles. Though cheaper than LED televisions, they cost a bit more than generation-old Plasma TVs and can be quite expensive when it comes to large screen sizes.

LED TVs, the most popular today, are basically LCD televisions with LEDs (Light Emitting Diodes) instead of CCFLs. Currently the best in the crop of displays in terms of power consumption, these offer better blacks than LCD televisions and are comparatively thinner as well. This type of TV also responds well to colour variations and acute viewing angles, giving the best user experience.

OLED is the display technology of the future, with the thinnest screen, amazing colour rendition, lower power consumption and better viewing angles than existing display types. However, TVs with OLED displays are extremely costly and suffer from poor lifespan.

Panel type: - VA vs IPS
LED and LCD and televisions available today come with either IPS or VA panels. Since both types of TVs have LCD displays (LED televisions are LCD televisions with LED bulbs instead of CCFLs), both have liquid crystals. The different between IPS and VA panels lies between the alignment of the liquid crystals -- horizontal in IPS and vertical in VA panel.

The advantage that IPS has over VA is that there is no distortion or damage to the screen even if it is hit quite hard. Apart from that, it also offers great viewing angles and maintains consistency of colours. Therefore, if you are worried about your kids damaging the brand new television, then go for IPS panels, otherwise VA panels will be suitable. LG and Philips use IPS panels, while others like Sony and Samsung have VA displays.

Pixelation is the same with both the panels and you should be seated at least eight to 10 feet away from the TV for best picture quality.

Brighter display does not always make a better TV. If you go for a TV that offers high brightness, the dark colours - like grey and black - will appear dull. Brightness level in LED TVs is the best since the blacks appear dark as well, while Plasma and LCD televisions follow it from afar.

Power consumption
LED TVs are the best choice if you are concerned about the amount of power consumed by your new television. This is because of the LED bulbs used in the display, which consume 20-30% less power than CCFL's of LCD TVs. Last in the race come Plasma televisions, which will add a hefty amount to your power bill as compared to LCD as well as LED TVs.

Refresh rates:
Refresh rate in a television refers to the speed at which the display changes images. Ever encountered the problem of motion blur on the TV? This is because of poor refresh rate. Higher refresh rate in a television translates to a clearer picture quality and reduce this motion blur or ghosting. Moreover, when it comes to gaming, the refresh rates matter a lot.

If you want to connect your Xbox, Play Station or Wii to your TV, then Plasma televisions are the best option, since the refresh rate can reach up to 600Hz. On the other hand, LCD TVs deliver the worst results when the subject is of refresh rates and motion blur is a common complaint. A LED television can be a decent choice since it can handle high refresh rates in videos and games and render a quality image.
source -TOI