[Quoth]

I doubt it.

Most of the people I know with ereaders have Kindles. NOT ONE uses Amazon's Cloud feature.
They only have one ereader (unlike me), so no need to sync. Most save on laptops.

The only things that would make Kobo ereaders more attractive to the mass market:
1) Cheaper than Kindle.
2) Able to use Amazon.

Competition Regulators should insist that all ebook sellers sell epub & dual-Mobi format.
Amazon is building a monopoly. They now have about 90% of ebook sales in USA, though it's a Publisher decision if DRM is used or not.

Also eink is a niche. The majority of commercial ebooks are read using apps on phones & tablets. Personally I prefer eink for reading.