Absolutely if Apple launched this UI it would be hailed as yet another example of the revolutionary innovative spirit that forms Apple's DNA...the stock would rocket!
BB10 is awesome. The Z10 is awesome. It's just gonna take time. The US is not the be all and end all. Recall,. The USA has many problems including it's financial system which socializes losses and privatizes profits.. Recall many analysts were projecting rosy economic growth right up until the day before their economy almost collapsed were it not for backing up the truck to the treasury and bailing all the too big to fail orgs.
Take analysts reports with a grain of salt. BB10 is a great platform and competitive phones that will take time to catch on in this hostile environment. Blackberry respects their competition as per Heins' comments. It will be a fight as we are seeing. BB knew that going in.
Competitors have great phones too and there is room for others to profit outside of the duopoly.