The mobile wallet is more convenient for newbies but it doesn't offer something special for average users. Everything the traders can do with a mobile wallets can be done through the web wallets and the security of desktop or web wallets are better compared to risks injected malware on rooted smartphones.
no doubt about usage mobile wallet for average users, but regarding to the security of the mobile wallet you only generelize for rooted smartphone though the number of rooted smartphone users are lower that unrooted smartphone users. So for them who don't root their device it should be safe enough to use in normal transaction activities.
Then, one of the reason the porject don't build the mobile wallet is the cost to build it. If the porject see the opportunities of customer satisfaction that gain the profit they will consider the building of mobile wallet in its roadmap. Please check deeper before you decide to invest so you will not regret.