I think the two technologies could have been much more beneficial if the PS3 as a whole had been a better machine to build games for.
Anyway, the Cell hasn't made a huge difference to our current generation of games I think. The biggest implication here, will probably be that developers are better able to utilize more cores for the coming generation of consoles from the get-go.
And the blu-ray could have been much more beneficial if the PS3 had had a faster drive. The few games that utilize it greatly hardly outweigh the losses in terms of overall installs and loadtimes. Although the blu-ray playback is pretty sweet, it just hasn't done much for the gaming side of things.
So no, I don't think there has been a real benefit to these two technologies. If the Cell had had all 8 SPUs, the blu-ray drive had been faster and the PS3 architechture had been easier to utilize, then I think we could have seen a more real benefit.