Well, given what I read about Nokia releasing this bundle as a platform and the fact that PySide and PyQT are API compatible, I can imagine someone coding necessary features against PySide and then just decide whether a switch to a lighter version (i.e. PyQt) warrants the 400 EUR investement.

All in all, it's a smart move. You code in a standard environment and if your deployment gets too large, you can just drop in a cheap and qualitative replacement. The end result is the same: faster and more applications on a Nokia platform. This may even be a good thing for PyQT.

Well, my theory is a bit rusty, but wouldn't this add some liquidity for the Redhat stock?

Might as well decrease as well if passively managed funds want to keep on to the shares, but going by gut feeling, I would think it's a good thing regardless. If anything, the share should be more correctly priced in the long run;

Depending on your definition of correct pricing of course.