It’s a well-known fact that LG’s already dominated the pixel density race in the smartphone market thanks to the Retina Display inside the iPhone 4, but we’ve yet to see similar technologies making their way to larger devices. That could change very soon, however, with Samsung and LG both announcing larger high-density panels to be showcased at SID 2011 next week. From Samsung we’ll be seeing its 10.1-inch 300ppi prototype LCD panel, which rakes up an astonishing resolution of 2,560 x 1,600 under the battery-friendly PenTile RGBW matrix (not to be confused with AMOLED and Super AMOLED’s RGBG arrangement). What’s more, Samsung also teases “commercial availability” for this technology later this year.

Things are a bit vague with LG — no specific resolutions are mentioned in the pre-show announcement, but we’re told that the company will introduce “a full line-up” of “ultra-high resolution” Advanced High Performance In-Plane Switching (AH-IPS) products, including 3.5-, 4.5-, 7-, 9.7, 55-, and 84-inch panels, with a “greater number of pixels than the PPI that can be recognized by the human eye at a typical distance” — a proclamation typically reserved for the iPhone 4′s 326ppi Retina Display. Of course, LG could be misleading here — the 9.7-inch panel brought up in the press release could just be the exact same 1,024 x 768 IPS display on the iPad, but we’d be surprised if LG doesn’t have a similarly-sized prototype to fire back at Samsung’s 10.1-inch 300ppi panel. Well, keep an eye out for our SID 2011 coverage next week and we’ll let you know what goodies we find.