Competition, generally, is a good thing. Look at the processor market, for example - AMD's inability to keep up with the Core i5/i7 jonses has effectively handed the whole sector to Intel for over a decade, and in turn that means progress has stagnated. With no-one snapping at their heels, Intel just doesn't have a reason to meaningfully push things forward.
Come next month, I'll have had the same processor for seven years. Graphics card? Not so much.
