If you intend to buy a digital camera for viewing the photos on TV you will look upon both end devices for reasonable good quality. You will buy first a good LCD with ''Bright Light'' screen and a 170degre viewing angle capability integrety and on it all the connectors needed for your present and future goals an needs. Then you will look for a good digital camera that will take equivalent pictures quality to see on the TV.

If you buy a digital camera for viewing and editing the photos on a Computer you will fallow the same logic. First a PC or Mac that will give you the power comfort to work with a good Photos software and secondly a good Monitor that will give you a good render in terms of colour and true light.

The basic law in digital photos is, at my knowledge, that a bigger resolution in term of Megapixel is better than a lower one if your choice is in relation with a Computer.
For editing photos, for improvement quality or transformation goals, One will need to have a larger resolution picture because it will permit a better quality correction or transformation. Plus the fact that cropping any photos to keep an object on a picture will be in a good resolution for small or very large print.
Yes it is actually possible, for getting a very large print, to increase, if necessary, a picture size without corrupting it using new software that will permit it.

But a the start of any type goals, in working with digital picture improvement or transformation, One should have a picture clean of any artefact.

That bring everyone serious to know that most of the general digital camera sold on the market actualy are provide with jpg capture encoding.

To understand that:

Extract from CNET editors' digital camera buying guide

JPEG: Small and fast for capture but has file compression that may introduce artifacts that degrade image quality.

RAW: Smaller than TIFFs and more flexible for postcapture retouching. Not offered on all cameras, and special software is required to read them.

TIFF: Large files that can slow down your shooting and fill up your media but have no compression artefacts.

In an other hand, bigger are your needs an goals in digital photography, more money will be involve in choosing the right camera an more time One will have to spend to learn all the feature and the capability of the camera. Same effort will be given to learn ''working pictures on a Computer'' an witch is the right Computer for my need.