There is a screen upgrade kit to give the Lynx a modern, active matrix LCD screen. I bought a battered old Model 1 to do the upgrade on but I never got around to ordering it since my technical skill in soldering and hardware repair is pretty lax.
A lot of the Lynx's library are arcade ports from Atari Games (Bally/Midway). And they're all pretty high quality. My first portable was the Atari Lynx, and I loved the damn thing. My co-worker was an out of work cargo plane pilot at the time, and I brought two Lynx units with a Comlynx cable and two copies of Warbirds, and we'd gun each other down during our lunch breaks. Great times. I've probably got four Lynx units now and the majority of the library (but not homebrews). It ranks very high on my list of favorite game machines.