Comment Not a good comparison (Score 4, Informative) 437
I don't think the comparison holds up well, because in the case of XP users had control of the upgrade while in the case of phones it's usually the handset maker and to a lesser extent the carrier in charge. Adoption of Lollipop is mainly a function of how many handset models ship with it installed and how quickly people are upgrading to newer models of phones. Most of the flagship models are shipping with some flavor of 4.2 or 4.4 on them, and enough people seem to have bought those models in the last year that it'll probably be summer at the earliest before we see the next cycle of upgrades start in earnest. The only way we'll see Lollipop uptake pick up faster than that is if Google manages to convince the handset makers to roll 5.0 out to phones like the Galaxy S4. It'd also help if carriers stopped insisting on different "models" where the difference is strictly in branding and the actual phone hardware is identical.