The ENVY TouchSmart 15-j105sa has a maximum display resolution of 1920 x 1080 pixels. That's 98% more display resolution than a 1366 x 768 pixels portable PC, which is the most frequently found display resolution.
A 1920 x 1080 pixels display resolution is actually the best display resolution amongst all many processor core laptops that have been around for a comparable time to the ENVY TouchSmart 15-j105sa.
Amongst similar types of portable PC the worst display resolution is 1366 x 768 pixels.
It may also be worth also looking at one of the alternative laptops that have a display resolution of 1920 x 1080 pixels currently available including because of it's better review score, the N56VJ, or the U500VZ (£649.99) both from Asus.