The Samsung one you shown is only a 1368x768 or something like that so you only have 768 virtical pixels and 1368 horizontal.
If you can afford it a proper 1080 TV it will have a resolution of 1920x1080,see the difference?
If you ever get a PS3 or Blu-ray or HD DVD player it will means you will get the full resolution as they output a 1920x1080 picture.
If you get the one you mentioned it is only 1368x768 so whilst it will display the picture perfectly okay you will loose some of the resolution as the picture with be "shrunk" to fit your screen.
Proper 1080 sets are expensive but it would be a better investment in the long term if you ever think you will get a HD device to connect it to.
The Samsung M87 range are killer TVs but the smallest is 37" and something like £1000
If you want to go quite cheap the Sony 32" S2530 can be had in Currys etc for £699 now,I paid £899 about 2-3 months ago,it can be had online cheaper still.